- According to the passage, 'mineralization' is the process of:
Answer: converting complex organic pollutants into simple inorganic substances.
When you encounter scientific vocabulary questions, focus on finding the direct definition provided in the passage rather than relying on what the term might mean in everyday language.
The passage explicitly defines mineralization in the final sentence: "complete mineralization, the conversion of complex organic molecules into simple inorganic compounds like carbon dioxide and water." This directly matches answer choice B, which describes converting complex organic pollutants into simple inorganic substances.
Let's examine why the other options are incorrect. Choice A describes phytoremediation using hyperaccumulators, which the passage explains involves plants absorbing and concentrating heavy metals—this is a completely different process from mineralization. Choice C misinterprets bioaugmentation; while the passage mentions introducing non-native microbial strains, this is done to degrade contaminants, not to increase mineral content. Choice D describes a physical solidification process that isn't mentioned anywhere in the passage.
The key distinction here is that mineralization specifically refers to the biochemical breakdown of organic compounds into their simplest inorganic forms, essentially "digesting" pollutants down to harmless basic molecules like CO₂ and H₂O.
For DAT reading comprehension questions about scientific terminology, always look for explicit definitions within the passage first. The test writers often provide clear explanations of technical terms, and the correct answer will closely mirror the passage's wording. Don't overthink based on outside knowledge—stick to what the text actually says.
- The passage defines 'apoptosis' as:
Answer: a regulated and orderly process of programmed cell death.
When you encounter reading comprehension questions that ask for definitions, focus on finding the explicit definition given in the passage rather than relying on outside knowledge.
The passage directly defines apoptosis in the opening sentence as "programmed cell death" that is "a highly regulated process for tissue homeostasis." It then contrasts this with necrosis and describes apoptosis as "an orderly dismantling of the cell." This language clearly points to answer choice D, which captures both the "regulated" and "orderly" nature of "programmed cell death."
Let's examine why the other choices miss the mark. Choice A describes necrosis, not apoptosis—the passage explicitly states that necrosis is "a traumatic form of cell death from acute injury that often causes inflammation," directly contrasting it with apoptosis. Choice B describes osmotic lysis or cell bursting, which isn't mentioned anywhere in the passage and contradicts the "orderly" nature of apoptosis described. Choice C refers to phagocytosis, which the passage mentions as what happens to the apoptotic bodies after apoptosis occurs, not as the definition of apoptosis itself.
For DAT reading comprehension questions, always return to the passage text when asked for definitions. Don't get distracted by related processes mentioned in the passage—the question asks specifically what apoptosis is, not what happens before or after it. Look for direct definitional language and key descriptive terms that match the answer choices exactly.
- The passage describes mantle 'convection' as the:
Answer: circulation of rock within the mantle driven by heat transfer.
When you encounter questions about geological processes, focus on identifying the specific mechanism being described and distinguishing it from related but distinct processes.
The passage explicitly defines mantle convection in its final sentence: "heat from the Earth's core drives the slow circulation of rock, which in turn propels the plates." This describes convection as a heat-driven circulation process within the mantle that powers plate movement. Answer choice B captures this definition perfectly by identifying convection as the "circulation of rock within the mantle driven by heat transfer."
Let's examine why the other options are incorrect. Choice A describes earthquakes, not convection—the passage mentions that "immense stress in a subduction zone is often released as powerful earthquakes," which is a sudden stress release along fault lines. Choice C defines subduction, where "the denser oceanic plate is forced to slide beneath the lighter one." Choice D describes hotspot volcanism, where plates moving "over a stationary hotspot" create "a volcanic chain."
Each wrong answer represents a different geological process mentioned in the passage, making this a classic definitional question that tests whether you can match terms to their specific meanings rather than getting confused by related concepts.
For reading comprehension questions about scientific processes, always look for the passage's explicit definition of the term in question. The passage will typically provide a clear explanation—here, convection is directly linked to heat-driven rock circulation. Don't let related processes distract you from the specific mechanism being defined.
- In the context of the passage, deterministic means...
A medical physics note explains that not all radiation injuries behave the same way. The passage describes deterministic effects as those that have a dose threshold and become more severe as dose increases above that threshold. For instance, skin erythema (reddening) or cataract formation may occur when localized tissue receives sufficiently high dose; below the threshold, the effect does not appear because too few cells are damaged to impair tissue function. The note contrasts deterministic effects with stochastic effects, where any dose might carry some chance of cancer. The passage uses deterministic to emphasize a cause-and-effect relationship that depends on crossing a minimum dose, not merely accumulating small probabilities.
Answer: having a threshold dose and increasing in severity once that threshold is exceeded
This question tests the ability to determine the meaning of technical or scientific terms using contextual clues. Understanding technical terminology involves using context within passages to infer meanings (e.g., context clues like definitions, synonyms, or examples). In this passage, the term 'deterministic' is used in the context of effects with a dose threshold where severity increases above it, providing clues to its meaning through examples like skin burns. Choice A is correct because it accurately captures the meaning of 'deterministic' as intended in the passage, reflecting threshold-dependent biological effects. Choice B is incorrect because it misinterprets the context clue, leading to a common misconception that 'deterministic' means occurring randomly with no relationship to dose. To teach this skill, encourage students to identify context clues such as definitions ('TERM means'), examples ('such as'), and synonyms (or, that is). Practice with diverse scientific texts to reinforce this skill.
- As used in the passage, the term 'adjuvants' most nearly means:
Answer: substances that amplify an antigen's ability to provoke an immune reaction.
When you encounter vocabulary-in-context questions on reading comprehension tests, don't rely on your prior knowledge of the term. Instead, use the passage itself as your dictionary by examining how the word functions within the surrounding sentences.
The passage defines adjuvants explicitly: they are "substances that potentiate the immunogenicity of an antigen without conferring any specific immunity themselves." The key phrase "potentiate the immunogenicity" means they strengthen or amplify the antigen's ability to trigger immune responses. The passage reinforces this by explaining that while antigens alone are "often insufficient," adjuvants "enhance this response" through mechanisms like the depot effect and immune cell activation.
Choice B correctly captures this amplifying function—adjuvants boost an antigen's immune-provoking ability without being the primary immune trigger themselves.
Choice A is wrong because the passage explicitly states adjuvants do "not confer any specific immunity themselves"—they enhance rather than directly provide immunity. Choice C mischaracterizes adjuvants as mere stabilizers when the passage emphasizes their active role in immune enhancement. Choice D confuses adjuvants with PAMPs (pathogen-associated molecular patterns); while modern adjuvants may mimic PAMPs, adjuvants and PAMPs are distinct concepts.
For vocabulary-in-context questions, always look for explicit definitions, synonyms, or functional descriptions within the passage. The authors often provide these clues in the same sentence or nearby sentences, just as this passage does with its clear definition of what adjuvants do versus what they don't do.
- The phrase 'microbial consortia' is used to describe:
Answer: a cooperative community composed of multiple types of microorganisms.
This question tests your understanding of terminology used in bioremediation, specifically focusing on how microorganisms work together in environmental cleanup processes.
The passage directly defines "microbial consortia" as "synergistic communities of different microorganisms that work together." The key word here is "consortia" - a term that inherently means a group or association of entities working together toward a common goal. In bioremediation, these communities are particularly effective because different microorganisms contribute different metabolic capabilities, allowing them to break down contaminants more completely than any single species could alone.
Choice C correctly captures this collaborative aspect - microbial consortia are indeed cooperative communities of multiple microorganism types. Choice A contradicts the passage by describing a single species rather than multiple organisms working together. Choice B confuses the biological agents (microorganisms) with what they're treating (contaminants) - consortia refer to the cleanup crews, not the pollution itself. Choice D misidentifies consortia as laboratory equipment rather than living biological communities.
When encountering scientific terminology questions on the DAT, look for context clues within the passage itself. The passage often provides definitions or descriptive phrases that directly explain technical terms. Here, "synergistic communities" immediately follows "microbial consortia," giving you the definition. Don't overthink these questions - the answer is usually explicitly stated or strongly implied in the text you're given.
- How does the passage define linear no-threshold model?
A risk-communication article discusses how scientists estimate cancer risk from low-dose ionizing radiation. Because direct experiments at very low doses are difficult, regulators often use the linear no-threshold model. The passage defines this model as the assumption that risk increases in direct proportion to dose (linear) and that there is no dose so small that risk is exactly zero (no threshold). The article notes that the model is conservative: it likely overestimates risk at very low doses, but it provides a simple framework for policy. It also contrasts the model with a threshold hypothesis, which would claim that below some dose the body's repair mechanisms prevent any added risk. The passage emphasizes that whichever model is used, immediate clinical decisions still weigh diagnostic benefit against potential long-term harm.
Answer: an assumption that risk rises proportionally with dose and has no safe cutoff
This question tests the ability to determine the meaning of technical or scientific terms using contextual clues. Understanding technical terminology involves using context within passages to infer meanings (e.g., context clues like definitions, synonyms, or examples). In this passage, the term 'linear no-threshold model' is used in the context of assuming risk increases proportionally with dose without a safe minimum, providing clues to its meaning through a definition contrasting it with threshold models. Choice D is correct because it accurately captures the meaning of 'linear no-threshold model' as intended in the passage, reflecting a conservative risk estimation approach. Choice A is incorrect because it misinterprets the context clue, leading to a common misconception that 'linear no-threshold model' means a claim that only extremely high doses cause any biological effect. To teach this skill, encourage students to identify context clues such as definitions ('TERM means'), examples ('such as'), and synonyms (or, that is). Practice with diverse scientific texts to reinforce this skill.
- The author uses the word threshold to refer to...
A passage comparing radiation effects explains that some injuries do not appear until exposure is high enough. It states that a threshold is a minimum dose level below which a particular deterministic effect is not observed. The passage illustrates this with tissue function: organs can tolerate some damaged cells because remaining cells compensate, but once damage exceeds a critical point, symptoms emerge. The author contrasts this with the linear no-threshold approach used for cancer risk, where no strictly safe cutoff is assumed. Thus, threshold is presented as a boundary point separating "no observable effect" from "observable effect" for certain outcomes.
Answer: a minimum dose boundary below which a specific effect is not seen
This question tests the ability to determine the meaning of technical or scientific terms using contextual clues. Understanding technical terminology involves using context within passages to infer meanings (e.g., context clues like definitions, synonyms, or examples). In this passage, the term 'threshold' is used in the context of a minimum dose below which deterministic effects are not observed, providing clues to its meaning through an illustration of tissue compensation. Choice A is correct because it accurately captures the meaning of 'threshold' as intended in the passage, reflecting a boundary for observable effects. Choice B is incorrect because it misinterprets the context clue, leading to a common misconception that 'threshold' means the maximum dose a scanner can deliver in a single rotation. To teach this skill, encourage students to identify context clues such as definitions ('TERM means'), examples ('such as'), and synonyms (or, that is). Practice with diverse scientific texts to reinforce this skill.
- As used in the passage, 'blebbing' refers to the:
Answer: formation of outward bulges in the cell membrane during apoptosis.
When you encounter vocabulary-in-context questions on the DAT, you need to locate the term in the passage and understand how it's defined or described within that specific context, rather than relying on prior knowledge.
The passage directly defines "blebbing" in the sentence: "A hallmark of apoptosis is blebbing, where the cell membrane bulges outward as the cytoskeleton collapses." This explicit definition tells you that blebbing involves the cell membrane forming outward bulges during the apoptotic process. The passage explains this happens because the cytoskeleton (the cell's structural framework) breaks down, causing the membrane to lose its shape and form these characteristic bulges.
Looking at the wrong answers: Choice A describes DNA breakdown, which isn't mentioned in relation to blebbing—the passage focuses on membrane changes, not nuclear events. Choice B refers to caspase activation, but the passage presents this as a separate step that occurs before blebbing, not as the definition of blebbing itself. Choice C describes phagocytosis by immune cells, which the passage mentions as happening after blebbing, when immune cells clean up the apoptotic bodies that form from the blebbed cell.
The correct answer is D because it directly matches the passage's explicit definition of blebbing as outward membrane bulges.
For vocabulary-in-context questions, always look for explicit definitions or descriptions in the surrounding sentences rather than assuming you know what technical terms mean. The passage will provide the context clues you need to identify the correct meaning.
- In the context of the passage, a 'xenobiotic' compound is one that is:
Answer: foreign to living systems and typically of synthetic origin.
When you encounter scientific terminology questions, focus on finding the definition within the passage rather than relying on outside knowledge. The passage directly defines xenobiotic compounds as "synthetic chemicals not naturally found in biological systems."
The correct answer is C because the passage explicitly states that xenobiotic compounds are synthetic (artificially made) and foreign to biological systems. This definition appears right in the text when discussing organic pollutants that bioremediation targets.
Let's examine why the other options are incorrect: A is wrong because the passage doesn't mention toxicity levels - xenobiotic simply refers to origin, not harmfulness. In fact, the passage discusses using microorganisms to break down these compounds, suggesting they aren't universally lethal to microbes. B is incorrect because the passage specifically identifies xenobiotics as synthetic chemicals, which directly contradicts the idea of natural plant production. D misses the mark because while some xenobiotics can be degraded by microorganisms (as the passage discusses with bioaugmentation), this isn't part of their definition - it's about their synthetic, foreign nature, not their biodegradability.
For DAT reading comprehension questions about scientific terms, always check if the passage provides a definition before applying outside knowledge. The test often includes the answer within the text itself. Look for phrases like "meaning they are" or similar definitional cues that directly explain terminology.
- As used in the passage, 'phytoremediation' is a process that uses:
Answer: living plants to clean up pollutants from soil and water.
When you encounter questions about specific remediation techniques, focus on breaking down the terminology to understand what each process actually involves.
The passage clearly defines phytoremediation as a strategy that "uses plants to remove, degrade, or contain pollutants." The prefix "phyto-" means plant, so phytoremediation literally means "plant remediation." The passage explains that certain plants called hyperaccumulators can absorb and concentrate heavy metals in their tissues, demonstrating how living plants actively clean up contaminated environments. This directly supports answer choice D.
Let's examine why the other options don't fit. Choice A describes bioaugmentation, which the passage mentions as introducing non-native microbial strains - bacteria, not plants. Choice B refers to mineral-based remediation, but phytoremediation specifically involves living biological systems (plants), not minerals. Choice C focuses on fungal decomposition, which relates to the microbial activity mentioned for organic pollutants, but fungi aren't plants and this isn't what phytoremediation describes.
The key trap here is that the passage discusses multiple remediation strategies - microbial activity, bioaugmentation, and phytoremediation - but you need to match the specific term to its specific definition. Don't let the surrounding information about other biological processes confuse you.
For DAT reading comprehension questions about scientific processes, always look for explicit definitions in the passage first, then use word roots as backup confirmation. When a passage defines multiple related concepts, make sure you're connecting the right term to the right process.
- In the passage, 'synaptic plasticity' is best described as the:
Answer: capacity of neural connections to change their strength over time.
When you encounter questions about neuroplasticity, focus on the dynamic nature of neural connections. The brain isn't a fixed circuit board—it's constantly adapting and changing based on experience and activity.
The passage directly defines synaptic plasticity as "the ability of synapses to strengthen or weaken over time." This immediately points to answer B, which captures this capacity for neural connections to change their strength. The entire passage then explains how this works through long-term potentiation (LTP), where repeated activity between neurons leads to stronger connections through structural and chemical changes.
Looking at the incorrect options: Answer A describes neurogenesis (creating new neurons), which is a different process entirely from synaptic plasticity. Answer C states the exact opposite of what synaptic plasticity means—it describes fixed, unchanging connections, while plasticity is all about change and adaptation. Answer D describes action potential propagation along an axon, which is about signal transmission within a single neuron rather than the strengthening or weakening of connections between neurons.
The passage reinforces the correct answer by explaining how synapses can be "strengthened" through repeated activation and how this involves "structural and chemical changes that fortify the connection." This is plasticity in action—connections literally becoming stronger through use.
Remember that "plasticity" in neuroscience always refers to the brain's ability to change and adapt. When you see this term on the DAT, think "changeability" rather than any fixed or static process.
- As used in the passage, 'dendritic spines' are best understood as:
Answer: tiny extensions on a dendrite that form the location of many synapses.
When you encounter questions about neural anatomy, focus on identifying the specific structural components and their locations within the neuron. The passage provides a clear definition by stating that dendritic spines are "small protrusions on dendrites where most excitatory synapses are located."
The correct answer is C because the passage explicitly describes dendritic spines as tiny extensions ("small protrusions") that exist on dendrites and serve as the primary sites for excitatory synaptic connections. The passage mentions that structural changes in these spines are part of the long-term potentiation process that strengthens neural connections.
Answer A confuses dendritic spines with neurotransmitter release channels, which are actually located at the presynaptic terminal where neurotransmitters are released, not where they're received. Answer B describes axons, the long projections that carry signals away from the cell body—this is anatomically distinct from dendrites, which receive signals. Answer D mistakes dendritic spines for receptor molecules themselves; while spines contain receptors, they are the physical structures that house these molecules, not the molecules themselves.
The passage clearly distinguishes between the physical structure (dendritic spines) and the chemical components (like glutamate receptors) that operate within them.
For DAT reading comprehension questions about biological structures, always look for explicit definitions in the passage and pay attention to the hierarchical relationships—spines are part of dendrites, dendrites are part of neurons, and receptors are located within spines. Don't let familiar terminology from different parts of the neuron confuse you.
- The term 'bioaugmentation' in the passage refers to the practice of:
Answer: introducing specialized external microorganisms to a polluted area.
This question tests your ability to identify specific scientific terminology and extract precise definitions from context. When you encounter technical terms in reading comprehension, look for explicit definitions or descriptive phrases that immediately follow the term.
The passage directly defines bioaugmentation as "the introduction of non-native microbial strains selected for their ability to degrade a target contaminant." This clearly describes bringing in specialized external microorganisms from outside the contaminated environment. The key phrase "non-native microbial strains" indicates these are not organisms already present at the site, but rather carefully selected microbes introduced specifically for their pollution-fighting capabilities.
Looking at the incorrect options: Choice A focuses on enhancing native plants for phytoremediation, but bioaugmentation specifically involves microorganisms, not plants, and uses non-native rather than native species. Choice C describes adding nutrients to stimulate existing local microbes, which would be working with organisms already present rather than introducing new ones. Choice D mentions increasing mineral content, but bioaugmentation is about introducing microorganisms to break down contaminants, not about adding minerals to soil.
The correct answer is B because it accurately captures both essential elements: introducing organisms from outside the system ("external") and the fact that these are microorganisms specifically chosen for their contamination-fighting abilities.
When tackling definition questions on reading comprehension tests, always look for explicit definitional language in the passage first. Authors often provide clear explanations immediately after introducing technical terms, making these questions more straightforward than they initially appear.
- In the context of the passage, a 'hotspot' is a:
Answer: stationary point of high volcanic activity originating in the mantle.
When you encounter questions about geological features in reading comprehension passages, focus on how each term is specifically defined within that text rather than relying solely on outside knowledge.
The passage clearly defines a hotspot as "a fixed area of intense volcanic activity in the mantle not associated with a plate boundary." This definition contains three key characteristics: it's stationary ("fixed"), it involves volcanic activity, and it originates in the mantle. The passage further explains that as plates move over these stationary hotspots, they create volcanic chains. This description perfectly matches answer choice C.
Let's examine why the other options are incorrect. Choice A describes oceanic trenches, which the passage explicitly states are created by subduction at convergent boundaries, not hotspots. Choice B refers to earthquake zones along plate boundaries, but the passage specifically notes that hotspots are "not associated with a plate boundary." Choice D describes divergent plate boundaries where new oceanic crust forms, which is an entirely different geological process not mentioned in connection with hotspots.
For reading comprehension questions about technical topics, always return to the passage's exact wording rather than bringing in external knowledge that might contradict how terms are used in that specific text. Look for key phrases that directly define or describe the concept being asked about, and match those characteristics to the answer choices systematically.
- The term tube voltage in the passage can be replaced with...
An imaging physics passage explains why some X-rays penetrate better than others. The passage defines tube voltage (often listed as kVp) as the electrical potential difference that accelerates electrons toward the tube's target. Higher voltage gives electrons more kinetic energy, which produces higher-energy X-ray photons that are more penetrating and less readily attenuated by tissue. The author notes that increasing voltage can reduce contrast between soft tissues, because attenuation differences shrink when photons are very energetic. Thus, selecting tube voltage involves balancing penetration, contrast, and dose. The passage contrasts tube voltage with tube current, which mainly affects the number of photons rather than their energies.
Answer: the electrical potential that accelerates electrons, influencing X-ray photon energy
This question tests the ability to determine the meaning of technical or scientific terms using contextual clues. Understanding technical terminology involves using context within passages to infer meanings (e.g., context clues like definitions, synonyms, or examples). In this passage, the term 'tube voltage' is used in the context of the potential difference accelerating electrons to produce higher-energy photons, providing clues to its meaning through an explanation of penetration effects. Choice A is correct because it accurately captures the meaning of 'tube voltage' as intended in the passage, reflecting its role in photon energy. Choice B is incorrect because it misinterprets the context clue, leading to a common misconception that 'tube voltage' means the time interval used to decide whether PET photons are paired. To teach this skill, encourage students to identify context clues such as definitions ('TERM means'), examples ('such as'), and synonyms (or, that is). Practice with diverse scientific texts to reinforce this skill.
- In the context of the passage, 'modulus of elasticity' refers to a material's:
Answer: measure of stiffness, or its resistance to being deformed elastically.
When you encounter scientific terminology in reading comprehension passages, focus on how the term is used within context rather than relying solely on outside knowledge. Here, the passage provides key clues about what "modulus of elasticity" means.
The passage states that "an ideal implant should have a modulus similar to that of cortical bone to avoid stress shielding." It then explains that stress shielding occurs "where the implant carries too much of the occlusal load." This context reveals that modulus of elasticity relates to how materials handle mechanical stress and load distribution. The passage emphasizes matching the implant's modulus to bone's modulus to ensure proper load sharing, indicating this property measures how much a material deforms under stress—in other words, its stiffness or resistance to elastic deformation. This directly supports answer B.
Answer A incorrectly describes impact resistance or toughness, which relates to fracture prevention rather than elastic deformation. The passage discusses load distribution, not sudden impacts.
Answer C confuses modulus of elasticity with osseointegration itself. While both concepts appear in the passage, osseointegration is the biological bonding process, whereas modulus is a mechanical property that affects successful integration.
Answer D misinterprets the term as density. Though material weight matters for implants, the passage's discussion of load sharing and stress distribution clearly indicates a mechanical stiffness property, not mass per unit volume.
Remember: on reading comprehension questions about technical terms, let the passage context guide you toward the answer rather than external definitions you might know.
- In the context of the passage, 'immunogenicity' refers to the:
Answer: capacity of an antigen to induce a specific and effective immune response.
When you encounter scientific terminology questions on the DAT, focus on breaking down the word parts and using context clues from the passage to understand the meaning.
The term "immunogenicity" can be decoded by examining its components: "immuno-" (relating to immunity) and "-genic" (producing or generating). The passage provides crucial context by stating that adjuvants "potentiate the immunogenicity of an antigen," meaning they enhance the antigen's ability to generate an immune response. This directly supports answer choice C - immunogenicity refers to the capacity of an antigen to induce a specific and effective immune response.
Looking at the incorrect options: Answer choice A confuses immunogenicity with the "depot effect" mentioned in the passage, which specifically describes how aluminum salts slowly release antigens. Answer choice B misinterprets immunogenicity as toxicity - while the passage mentions potential harm from "overzealous responses," immunogenicity itself refers to the beneficial ability to stimulate immunity, not cause damage. Answer choice D incorrectly suggests immunogenicity means complete immunity against all pathogens, but the passage focuses on specific immune reactions to particular antigens, not universal protection.
The passage reinforces this understanding by explaining how adjuvants work to enhance immunogenicity through mechanisms like activating antigen-presenting cells and triggering inflammatory cascades - all processes that boost the immune system's response to specific antigens.
For DAT reading comprehension, always look for word roots and use the surrounding text to confirm definitions. Scientific terms often have logical constructions that reveal their meanings when broken down systematically.
- The passage defines 'subduction' as the process where:
Answer: one tectonic plate slides underneath another at a convergent boundary.
When tackling reading comprehension questions about scientific processes, look for explicit definitions within the passage rather than relying on outside knowledge. The passage will contain the information you need.
The passage directly defines subduction in the third sentence: "When an oceanic plate meets a continental plate, the denser oceanic plate is forced to slide beneath the lighter one in a process known as subduction." This clearly describes one plate sliding underneath another at a convergent boundary, making D the correct answer.
Let's examine why the other options are incorrect. Choice A describes divergent boundaries where plates separate and new crust forms—the opposite of what happens in subduction zones. The passage focuses on convergent boundaries where plates collide, not separate. Choice B confuses subduction with earthquakes. While the passage mentions that subduction zones do generate earthquakes due to stress release, subduction itself is the sliding process, not the earthquake. Choice C describes volcanic formation but misses the key mechanism. Though subduction does create magma that feeds volcanoes, the process of subduction specifically refers to the plate sliding beneath another, not the magma rising.
For reading comprehension questions about scientific terms, always locate the passage's definition first. Don't let related concepts in the same paragraph distract you—subduction zones involve earthquakes, trenches, and volcanoes, but subduction itself has a specific meaning. Circle or underline key definitions as you read to avoid confusion between the main process and its effects.
- The passage indicates that 'phagocytosis' is the process by which:
Answer: apoptotic bodies are engulfed and cleared away by immune cells.
When you encounter reading comprehension questions that ask about specific terms or processes, focus on finding the exact context where that term appears in the passage and what role it plays in the larger process being described.
The passage describes phagocytosis in the final sentence: "These bodies are then cleared by immune cells through phagocytosis, preventing the release of cellular contents and thus avoiding an inflammatory response." The context shows that apoptotic bodies (the small fragments a dying cell breaks into) need to be removed, and phagocytosis is the mechanism by which immune cells accomplish this cleanup. This directly supports answer choice D.
Let's examine why the other options are incorrect. Choice A describes autophagy or the general dismantling process during apoptosis, but phagocytosis specifically involves one cell engulfing another - it's not self-dismantling. Choice B actually describes what phagocytosis prevents; the passage states that phagocytosis avoids inflammatory response by clearing away cellular debris before contents can spill out. Choice C describes blebbing, which is a different hallmark of apoptosis where the cell membrane bulges as the cytoskeleton collapses.
For DAT reading comprehension questions, always trace technical terms back to their specific mention in the passage rather than relying on outside knowledge. The passage will provide enough context clues to distinguish between related biological processes, even if they might seem similar from your background knowledge.
