TEAS: Science Quiz: Interpret Experimental Data
20 questions · exam conditions
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Interpret Experimental DataQuestion 1 of 20

Researchers investigated the effect of temperature on enzyme activity using catalase from potato extract. They measured oxygen production (indicating enzyme activity) at different temperatures: 0°C = 2 mL O₂/min, 20°C = 8 mL O₂/min, 37°C = 15 mL O₂/min, 60°C = 22 mL O₂/min, 80°C = 3 mL O₂/min, 100°C = 0 mL O₂/min. All other conditions remained constant.

What does this experimental data reveal about enzyme behavior?

Enzyme activity increases linearly with temperature across the entire range tested in this experiment.
Optimal enzyme activity occurs around 60°C, with activity declining at both lower and higher temperatures.
Temperature has minimal impact on enzyme function since activity was observed at most tested temperatures.
Enzyme denaturation begins at approximately 80°C as evidenced by the dramatic reduction in catalytic activity.
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TEAS: Science Quiz

TEAS: Science Quiz: Interpret Experimental Data

Practice Interpret Experimental Data in TEAS: Science with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Interpret Experimental Data, giving you a quick way to practice the rules, question types, and explanations that matter most for TEAS: Science.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

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Question 1

Researchers investigated the effect of temperature on enzyme activity using catalase from potato extract. They measured oxygen production (indicating enzyme activity) at different temperatures: 0°C = 2 mL O₂/min, 20°C = 8 mL O₂/min, 37°C = 15 mL O₂/min, 60°C = 22 mL O₂/min, 80°C = 3 mL O₂/min, 100°C = 0 mL O₂/min. All other conditions remained constant.

What does this experimental data reveal about enzyme behavior?

  1. Enzyme activity increases linearly with temperature across the entire range tested in this experiment.
  2. Optimal enzyme activity occurs around 60°C, with activity declining at both lower and higher temperatures. (correct answer)
  3. Temperature has minimal impact on enzyme function since activity was observed at most tested temperatures.
  4. Enzyme denaturation begins at approximately 80°C as evidenced by the dramatic reduction in catalytic activity.
Explanation: The data shows peak activity at 60°C (22 mL O₂/min), with lower activity at both lower temperatures (0-37°C) and higher temperatures (80-100°C). Choice A is wrong because activity doesn't increase linearly - it peaks then decreases. Choice C is wrong because temperature has a dramatic impact. Choice D is wrong because significant denaturation appears to occur between 60-80°C, not starting at 80°C.

Question 2

Environmental scientists measured water quality parameters in a lake over four seasons. Dissolved oxygen levels were: Spring = 9.2 mg/L, Summer = 6.8 mg/L, Fall = 8.5 mg/L, Winter = 11.1 mg/L. Water temperatures were: Spring = 15°C, Summer = 24°C, Fall = 18°C, Winter = 4°C. Algae biomass measurements were: Spring = 12 g/m³, Summer = 28 g/m³, Fall = 15 g/m³, Winter = 3 g/m³.

What relationship do these environmental data demonstrate?

  1. Dissolved oxygen levels correlate positively with water temperature throughout the seasonal measurement period.
  2. Algae biomass remains relatively constant across seasons indicating stable aquatic ecosystem conditions.
  3. Higher water temperatures correspond with increased algae growth and decreased dissolved oxygen concentrations. (correct answer)
  4. Winter conditions promote maximum algae productivity due to optimal dissolved oxygen and temperature combinations.
Explanation: Summer shows highest temperature (24°C), highest algae biomass (28 g/m³), and lowest dissolved oxygen (6.8 mg/L). Winter shows opposite pattern. This indicates an inverse relationship between temperature/algae and oxygen. Choice A is wrong because oxygen and temperature show inverse correlation. Choice B is wrong because algae varies greatly (3-28 g/m³). Choice D is wrong because winter had minimum algae biomass.

Question 3

Geologists analyzed mineral composition in rock samples from different depths. Quartz percentages were: Surface level = 45%, 50 meters = 38%, 100 meters = 31%, 200 meters = 22%. Feldspar percentages were: Surface = 25%, 50 meters = 32%, 100 meters = 38%, 200 meters = 45%. Mica remained constant at approximately 15% across all depths sampled.

What geological pattern do these compositional data reveal?

  1. Quartz concentration increases with depth while feldspar content decreases throughout the sampled rock formation.
  2. Mica content varies significantly with depth indicating differential weathering processes affecting this mineral component.
  3. Quartz decreases and feldspar increases with depth suggesting different formation conditions or metamorphic processes. (correct answer)
  4. All mineral components maintain relatively stable concentrations indicating uniform geological conditions during rock formation.
Explanation: Quartz decreases with depth (45%→22%) while feldspar increases (25%→45%), showing inverse relationship. This suggests changing geological conditions with depth. Choice A states the opposite relationship. Choice B is wrong because mica remained constant at ~15%. Choice D is wrong because quartz and feldspar showed significant changes with depth.

Question 4

Microbiologists tested bacterial growth at different pH levels. E. coli cultures were grown in media with varying pH values. Colony counts after 24 hours were: pH 4 = 0 colonies, pH 5 = 12 colonies, pH 6 = 89 colonies, pH 7 = 245 colonies, pH 8 = 201 colonies, pH 9 = 45 colonies, pH 10 = 0 colonies. Temperature, nutrients, and oxygen levels remained constant.

Based on these microbiological findings, which conclusion is most accurate?

  1. E. coli demonstrates optimal growth in alkaline conditions with maximum reproduction occurring at pH 10.
  2. Bacterial growth increases proportionally with pH values across the entire range tested in this experiment.
  3. E. coli exhibits optimal growth near neutral pH with significantly reduced viability at extreme acidic or basic conditions. (correct answer)
  4. pH has minimal influence on bacterial growth patterns since colonies were observed at multiple pH levels.
Explanation: Maximum growth occurred at pH 7 (245 colonies) with dramatic decreases at pH extremes (0 colonies at pH 4 and 10). This shows optimal growth near neutral pH. Choice A is wrong because pH 10 had 0 colonies, not maximum growth. Choice B is wrong because growth peaked at pH 7, not increasing proportionally. Choice D is wrong because pH had dramatic effects on colony counts.

Question 5

A physics laboratory measured the coefficient of friction for different material combinations. Static friction coefficients were determined: Rubber on concrete = 0.68, Steel on ice = 0.15, Wood on wood = 0.42, Plastic on glass = 0.31. Kinetic friction coefficients for the same pairs were: Rubber on concrete = 0.52, Steel on ice = 0.08, Wood on wood = 0.35, Plastic on glass = 0.24.

What mechanical relationship do these experimental data reveal?

  1. Kinetic friction coefficients consistently exceed static friction values for all material combinations tested.
  2. Static friction provides greater resistance to motion than kinetic friction across all surface pairs examined. (correct answer)
  3. Friction coefficients remain constant regardless of whether surfaces are stationary or in relative motion.
  4. Steel and ice demonstrate superior frictional properties compared to other material combinations studied.
Explanation: In every case, static friction exceeds kinetic friction: rubber (0.68 vs 0.52), steel (0.15 vs 0.08), wood (0.42 vs 0.35), plastic (0.31 vs 0.24). This is a fundamental physics principle. Choice A is wrong because it states the opposite relationship. Choice C is wrong because coefficients clearly differ between static and kinetic conditions. Choice D is wrong because steel on ice had the lowest friction coefficients.

Question 6

Psychologists investigated memory retention using different study techniques. Participants learned word lists and were tested after one week. Recall percentages were: Passive reading = 23%, Highlighting = 31%, Note-taking = 47%, Self-testing = 68%, Spaced repetition = 72%. All groups spent equal time studying and had similar baseline memory abilities.

What cognitive pattern do these memory research data reveal?

  1. Passive learning strategies produce superior long-term retention compared to active engagement techniques.
  2. All study methods result in equivalent memory performance indicating minimal technique-dependent learning differences.
  3. Active learning strategies involving self-testing and spaced repetition demonstrate superior memory retention outcomes. (correct answer)
  4. Highlighting and note-taking represent optimal study approaches for maximizing long-term information recall.
Explanation: Self-testing (68%) and spaced repetition (72%) produced the highest retention, both involving active recall. These outperformed passive methods like reading (23%) and highlighting (31%). Choice A is wrong because passive reading had the lowest retention. Choice B is wrong because results varied significantly (23-72%). Choice D is wrong because self-testing and spaced repetition exceeded highlighting and note-taking performance.

Question 7

Renewable energy researchers measured solar panel efficiency under different atmospheric conditions. Power output percentages of rated capacity were: Clear sunny day = 98%, Partly cloudy = 76%, Overcast = 42%, Light rain = 38%, Heavy rain = 15%. Ambient temperature remained between 20-25°C for all measurements, and panel orientation and angle were kept constant.

Based on these photovoltaic performance data, which environmental factor most significantly impacts solar energy generation?

  1. Temperature fluctuations within the measured range represent the dominant factor controlling solar panel electrical output.
  2. Solar panel orientation and positioning demonstrate greater influence on efficiency than atmospheric conditions.
  3. Cloud cover and precipitation substantially reduce solar panel performance compared to clear weather conditions. (correct answer)
  4. All atmospheric conditions produce equivalent energy generation indicating robust solar technology design characteristics.
Explanation: Clear conditions produced 98% efficiency while cloudy and rainy conditions dramatically reduced output (42-15%). This shows weather/cloud cover as the primary factor. Choice A is wrong because temperature was controlled and constant. Choice B is wrong because panel positioning was held constant while weather varied significantly. Choice D is wrong because conditions produced vastly different results (15-98%).

Question 8

Toxicologists tested the effects of different pesticide concentrations on bee mortality. After 48-hour exposure: Control (0 ppm) = 2% mortality, Low dose (5 ppm) = 12% mortality, Medium dose (15 ppm) = 34% mortality, High dose (50 ppm) = 78% mortality. Behavioral observations noted reduced foraging activity at concentrations above 10 ppm even when bees survived the exposure period.

What toxicological pattern do these experimental results demonstrate?

  1. Pesticide exposure produces threshold effects with mortality occurring only above critical concentration levels.
  2. Bee mortality increases with pesticide concentration showing a dose-dependent toxic response relationship. (correct answer)
  3. Low pesticide concentrations provide beneficial effects to bee populations by reducing competing insect species.
  4. Behavioral changes occur independently of pesticide concentration indicating separate neurological impact mechanisms.
Explanation: Mortality clearly increases with concentration: 0 ppm (2%) → 5 ppm (12%) → 15 ppm (34%) → 50 ppm (78%), showing classic dose-response relationship. Choice A is wrong because effects begin at the lowest tested dose, not above a threshold. Choice C is wrong because low doses increased mortality, showing no beneficial effects. Choice D is wrong because behavioral effects correlated with concentration (above 10 ppm).

Question 9

A genetics laboratory analyzed inheritance patterns in fruit flies. They crossed red-eyed females with white-eyed males. The F1 generation produced 156 red-eyed females, 149 red-eyed males, 0 white-eyed females, and 0 white-eyed males. The F2 generation from F1 crosses yielded: 198 red-eyed females, 101 red-eyed males, 52 white-eyed females, and 97 white-eyed males.

What inheritance pattern do these experimental results support?

  1. The eye color trait follows autosomal dominant inheritance with complete penetrance in both sexes.
  2. Eye color is controlled by X-linked recessive inheritance with males more frequently expressing the recessive phenotype. (correct answer)
  3. The trait demonstrates codominant inheritance patterns with equal expression in both parental and offspring generations.
  4. Eye color inheritance follows autosomal recessive patterns with environmental factors influencing phenotypic expression.
Explanation: F1 shows all red eyes (typical for X-linked recessive where females are carriers). F2 shows white-eyed males (~97) but fewer white-eyed females (~52), typical of X-linked recessive inheritance. Males need only one recessive allele to express the trait. Choice A is wrong because autosomal dominant wouldn't produce the observed sex-linked pattern. Choice C is wrong because there's no codominance shown. Choice D is wrong because the pattern is clearly sex-linked, not autosomal.

Question 10

Atmospheric scientists measured air pollution levels during different weather conditions in an urban area. PM2.5 concentrations were: Clear, windy day = 15 μg/m³, Clear, calm day = 28 μg/m³, Overcast, windy day = 22 μg/m³, Overcast, calm day = 45 μg/m³. Temperature and humidity remained similar across all measurement periods, and pollution sources remained constant.

Based on these environmental monitoring data, which factor most influences pollution levels?

  1. Cloud cover represents the primary determinant of particulate matter concentrations in urban atmospheric conditions.
  2. Wind conditions appear to have the greatest impact on PM2.5 levels regardless of cloud cover status. (correct answer)
  3. Weather conditions show minimal influence on air quality since pollution was detected under all circumstances.
  4. Temperature and humidity fluctuations primarily control particulate matter dispersion patterns in metropolitan areas.
Explanation: Comparing windy vs. calm conditions shows large differences: clear days (15 vs. 28 μg/m³) and overcast days (22 vs. 45 μg/m³). Wind appears to reduce concentrations more than cloud cover affects them. Choice A is wrong because cloud cover differences are smaller than wind effects. Choice C is wrong because weather clearly influenced pollution levels significantly. Choice D is wrong because temperature and humidity were stated to remain similar.

Question 11

Materials scientists tested thermal conductivity of different metal alloys. Heat transfer rates through identical sample dimensions were: Pure copper = 385 W/m·K, Bronze (90% Cu, 10% Sn) = 120 W/m·K, Brass (70% Cu, 30% Zn) = 85 W/m·K, Steel alloy = 45 W/m·K. All measurements were conducted at room temperature using standardized testing protocols.

Based on these thermal property measurements, which conclusion is best supported?

  1. Steel alloys demonstrate superior thermal conductivity compared to copper-based materials in engineering applications.
  2. Adding alloying elements to pure copper significantly reduces thermal conductivity compared to the pure metal. (correct answer)
  3. All metallic materials exhibit equivalent heat transfer properties regardless of their specific elemental composition.
  4. Brass compositions provide optimal thermal conductivity for applications requiring efficient heat dissipation systems.
Explanation: Pure copper has the highest conductivity (385 W/m·K), with all alloys showing reduced values: bronze (120), brass (85), steel (45). Adding other metals decreases copper's thermal conductivity. Choice A is wrong because steel had the lowest conductivity. Choice C is wrong because there are large differences (45-385 W/m·K). Choice D is wrong because pure copper, not brass, had optimal conductivity.

Question 12

Medical researchers investigated blood pressure responses to exercise in different age groups. Systolic pressure changes after 30 minutes of moderate exercise: Ages 20-30 (n=45): baseline 118 mmHg, post-exercise 142 mmHg. Ages 40-50 (n=52): baseline 128 mmHg, post-exercise 156 mmHg. Ages 60-70 (n=38): baseline 138 mmHg, post-exercise 168 mmHg. All participants were healthy nonsmokers.

What cardiovascular pattern do these clinical data demonstrate?

  1. Exercise produces equivalent blood pressure increases across all age groups studied in this research protocol.
  2. Older adults demonstrate greater cardiovascular responses to exercise with higher baseline and post-exercise pressures. (correct answer)
  3. Age has minimal influence on blood pressure regulation during physical activity in healthy adult populations.
  4. Young adults show the most significant blood pressure elevation indicating superior cardiovascular adaptation mechanisms.
Explanation: Both baseline and post-exercise pressures increase with age: 20-30s (118→142), 40-50s (128→156), 60-70s (138→168). This shows age-related cardiovascular changes. Choice A is wrong because the increases aren't equivalent (24, 28, 30 mmHg respectively). Choice C is wrong because age clearly influences both baseline and exercise response. Choice D is wrong because older adults showed greater absolute increases.

Question 13

Scientists tested the antibacterial effectiveness of four different essential oils against E. coli bacteria. They measured the diameter of zones of inhibition (clear areas where bacteria couldn't grow) around oil-soaked discs. Results: Tea tree oil = 15 mm, Lavender oil = 8 mm, Peppermint oil = 12 mm, Eucalyptus oil = 6 mm. Each test was replicated five times with consistent results.

What can be concluded from this experimental data?

  1. Tea tree oil demonstrates the strongest antibacterial activity against E. coli among the tested substances. (correct answer)
  2. Eucalyptus oil shows superior antimicrobial properties due to its consistent inhibition zone measurements.
  3. Lavender oil provides moderate antibacterial effects suitable for most clinical applications against gram-negative bacteria.
  4. Peppermint oil exhibits the most reliable antibacterial response based on the replicated experimental trials.
Explanation: Tea tree oil produced the largest inhibition zone (15 mm), indicating strongest antibacterial activity. Larger zones mean more effective bacterial inhibition. Choice B is wrong because eucalyptus had the smallest zone (6 mm), not superior properties. Choice C makes unsupported claims about clinical applications. Choice D is wrong because all oils had consistent results, and peppermint wasn't the most effective.

Question 14

A nutrition study examined vitamin C retention in vegetables using different cooking methods. Fresh broccoli initially contained 120 mg vitamin C per 100g. After cooking: Raw (control) = 120 mg, Steaming 5 min = 98 mg, Boiling 10 min = 65 mg, Microwaving 3 min = 105 mg, Stir-frying 4 min = 82 mg. All samples were analyzed immediately after cooking using identical laboratory procedures.

What do these nutritional data indicate about cooking methods?

  1. Boiling preserves the highest concentration of vitamin C compared to other thermal processing methods tested.
  2. Microwaving and steaming result in better vitamin C retention compared to boiling and stir-frying methods. (correct answer)
  3. All cooking methods produce equivalent vitamin C losses regardless of the specific thermal treatment applied.
  4. Stir-frying demonstrates superior nutrient preservation due to the rapid high-temperature cooking process utilized.
Explanation: Microwaving (105 mg) and steaming (98 mg) retained more vitamin C than boiling (65 mg) and stir-frying (82 mg). These gentler methods preserve water-soluble vitamins better. Choice A is wrong because boiling had the lowest retention (65 mg). Choice C is wrong because there are significant differences between methods (65-105 mg range). Choice D is wrong because stir-frying (82 mg) had lower retention than microwaving and steaming.

Question 15

A researcher investigated the effect of different fertilizer concentrations on plant growth. Seeds were planted in identical pots with the same soil type. Group A received no fertilizer, Group B received 5% fertilizer solution, Group C received 10% fertilizer solution, and Group D received 20% fertilizer solution. After 30 days, average plant heights were: Group A = 12 cm, Group B = 18 cm, Group C = 24 cm, Group D = 15 cm.

Based on the experimental data, which conclusion is most supported?

  1. Plant growth increases proportionally with fertilizer concentration across all tested ranges.
  2. Moderate fertilizer concentrations promote growth, but excessive concentrations may inhibit plant development. (correct answer)
  3. Fertilizer has no significant effect on plant growth when controlling for environmental factors.
  4. The 20% fertilizer concentration represents the optimal condition for maximizing plant height growth.
Explanation: The data shows growth increases from 0% to 10% fertilizer (12→18→24 cm), but then decreases at 20% (15 cm). This suggests an optimal concentration exists between 10-20%, with higher concentrations becoming inhibitory. Choice A is wrong because growth doesn't increase proportionally - it decreases at 20%. Choice C is wrong because there are clear differences between groups. Choice D is wrong because 20% showed decreased growth compared to 10%.

Question 16

Agricultural scientists tested crop yield responses to different irrigation schedules. Corn plants received water according to: Daily irrigation = 8.2 tons/hectare, Every 2 days = 7.6 tons/hectare, Every 3 days = 6.8 tons/hectare, Weekly irrigation = 4.1 tons/hectare. Soil moisture was monitored throughout the growing season, and all plots received identical fertilization and pest management.

Based on these agricultural findings, which conclusion is most supported?

  1. Weekly irrigation produces optimal crop yields by allowing soil moisture cycles that promote root development.
  2. Corn yield decreases as irrigation intervals increase, indicating sensitivity to water availability timing. (correct answer)
  3. All irrigation schedules produce equivalent yields demonstrating crop resilience to varying water management strategies.
  4. Excessive irrigation frequency reduces crop productivity due to waterlogged soil conditions and root damage.
Explanation: Yields clearly decrease as irrigation intervals increase: daily (8.2), every 2 days (7.6), every 3 days (6.8), weekly (4.1 tons/hectare). This shows corn responds positively to more frequent watering. Choice A is wrong because weekly irrigation gave the lowest yield. Choice C is wrong because yields varied significantly (4.1-8.2 tons/hectare). Choice D is wrong because more frequent irrigation increased, not decreased, yields.

Question 17

A pharmacology study tested drug absorption rates in the digestive system. Participants received identical doses of a medication in different formulations. Blood drug concentrations were measured after 1 hour: Liquid formulation = 45 μg/mL, Capsule formulation = 32 μg/mL, Tablet formulation = 28 μg/mL, Extended-release tablet = 18 μg/mL. All participants had similar body weights and fasting status.

Based on these pharmacokinetic findings, which conclusion is best supported?

  1. Extended-release tablets provide superior bioavailability compared to other pharmaceutical formulations tested in this study.
  2. Liquid formulations demonstrate faster absorption characteristics resulting in higher initial blood drug concentrations. (correct answer)
  3. Tablet and capsule formulations show equivalent therapeutic effectiveness based on their similar absorption profiles.
  4. All formulations achieve identical steady-state drug levels regardless of their initial absorption rate differences.
Explanation: Liquid formulation achieved the highest blood concentration (45 μg/mL) at 1 hour, indicating faster absorption. Liquids typically absorb faster than solid forms. Choice A is wrong because extended-release had the lowest concentration, not superior bioavailability. Choice C makes unsupported claims about therapeutic effectiveness. Choice D is wrong because we only have 1-hour data, not steady-state information.

Question 18

Marine biologists studied coral growth rates at different depths in tropical waters. Annual growth measurements were: 5 meters depth = 15.2 cm/year, 10 meters = 12.8 cm/year, 20 meters = 8.4 cm/year, 30 meters = 4.1 cm/year. Light penetration levels were simultaneously measured: 5m = 85% surface light, 10m = 65%, 20m = 35%, 30m = 15%. Water temperature and nutrients remained relatively constant.

What ecological relationship do these marine data indicate?

  1. Coral growth rates increase with water depth due to reduced wave action and improved stability.
  2. Light availability appears to correlate positively with coral growth rates in these marine environments. (correct answer)
  3. Water depth has minimal influence on coral development since growth occurred at all sampled depths.
  4. Optimal coral growth occurs at intermediate depths where light and pressure conditions reach equilibrium.
Explanation: Both light penetration and growth rates decrease with depth: shallow waters (85% light, 15.2 cm/year) to deep waters (15% light, 4.1 cm/year). This suggests light limitation affects coral growth. Choice A is wrong because growth decreased, not increased with depth. Choice C is wrong because depth clearly influenced growth rates significantly. Choice D is wrong because optimal growth was at the shallowest depth, not intermediate depths.

Question 19

Immunologists studied antibody production following vaccination with different adjuvants. Antibody levels 4 weeks post-vaccination were measured: Aluminum adjuvant = 1,250 units/mL, Oil-based adjuvant = 2,180 units/mL, Saline control = 380 units/mL, Polymer adjuvant = 1,690 units/mL. All vaccine formulations contained identical antigen concentrations and were administered to similar population groups.

What immunological relationship do these data demonstrate?

  1. Saline control produces the most robust immune response indicating natural immunity superiority over adjuvanted vaccines.
  2. Oil-based adjuvants enhance antibody production more effectively than aluminum or polymer-based immune stimulants. (correct answer)
  3. All adjuvant types generate equivalent immune responses regardless of their specific chemical composition or mechanism.
  4. Polymer adjuvants demonstrate inferior immunological properties compared to traditional aluminum-based vaccine enhancers.
Explanation: Oil-based adjuvant produced the highest antibody levels (2,180 units/mL) compared to aluminum (1,250), polymer (1,690), and saline control (380). This shows oil-based adjuvants are most effective. Choice A is wrong because saline had the lowest response. Choice C is wrong because there are significant differences between adjuvants. Choice D is wrong because polymer (1,690) outperformed aluminum (1,250).

Question 20

Sleep researchers monitored REM sleep duration across different age groups during 8-hour sleep studies. Average REM sleep times were: Infants (6-12 months) = 240 minutes, Children (5-10 years) = 120 minutes, Adolescents (15-18 years) = 105 minutes, Young adults (25-35 years) = 90 minutes, Elderly (65-75 years) = 75 minutes. All participants were healthy with normal sleep patterns.

What developmental pattern do these sleep data demonstrate?

  1. REM sleep duration increases progressively throughout human development reaching maximum levels in elderly populations.
  2. REM sleep time decreases substantially from infancy through old age suggesting changing neurological requirements. (correct answer)
  3. All age groups demonstrate equivalent REM sleep proportions indicating stable sleep architecture across the lifespan.
  4. Adolescents require the greatest amount of REM sleep due to rapid brain development and learning consolidation needs.
Explanation: REM sleep shows clear decrease with age: infants (240 min) → elderly (75 min). This represents a 4-fold decrease across the lifespan. Choice A is wrong because REM decreases, not increases with age. Choice C is wrong because there are dramatic differences between age groups. Choice D is wrong because infants had the highest REM sleep, not adolescents.