Middle School Science Quiz: Resources Affect Growth
20 questions · exam conditions
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Resources Affect GrowthQuestion 1 of 20

A student claims: "Adding more and more water will always increase plant growth." The student tested 4 water levels on the same type of plant for 5 weeks and measured average height increase.

Which choice is the best evaluation of the claim using the data and evidence? (Resources can limit or support growth.)

The claim is supported because the plants grew at least a little at every water level.
The claim is not supported because growth increased up to 120 mL/week but decreased at 180 mL/week.
The claim is supported because the tallest plants must have had the best traits.
The claim cannot be evaluated because the data should be ignored when making conclusions.
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Middle School Science Quiz

Middle School Science Quiz: Resources Affect Growth

Practice Resources Affect Growth in Middle School 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 Resources Affect Growth, giving you a quick way to practice the rules, question types, and explanations that matter most for Middle School 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.

All questions

Question 1

A student claims: "Adding more and more water will always increase plant growth." The student tested 4 water levels on the same type of plant for 5 weeks and measured average height increase.

Which choice is the best evaluation of the claim using the data and evidence? (Resources can limit or support growth.)

  1. The claim is supported because the plants grew at least a little at every water level.
  2. The claim is not supported because growth increased up to 120 mL/week but decreased at 180 mL/week. (correct answer)
  3. The claim is supported because the tallest plants must have had the best traits.
  4. The claim cannot be evaluated because the data should be ignored when making conclusions.
Explanation: The core skill is assessing claims about resource-growth relationships with data. Resources like water influence growth, but the idea that more always increases it is flawed as excesses can cause stress. The data show growth peaking at 120 mL/week and declining at 180 mL/week, not supporting the claim of always increasing with more water. A strategy is to plot growth against resource levels and check for continuous increase. A misconception is that traits alone drive growth differences, disregarding resources. Ultimately, growth depends on resource availability being optimal. When resources are imbalanced, growth is limited rather than supported.

Question 2

A student grew the same species of bean plant for 4 weeks with different amounts of water each week. The table shows the average height increase for each group.

Using the data as evidence, which statement about how the resource (water) affects growth is supported? (Resources can limit or support growth.)

  1. Plants in the 50 mL/week group grew the most, so less water always supports more growth.
  2. Plants with 150 mL/week had the greatest average height increase, so this water level supported the most growth in this investigation. (correct answer)
  3. The 200 mL/week group grew less because those plants were probably healthier and needed less growth.
  4. All groups would reach the same height eventually because growth depends mostly on age, not water.
Explanation: The core skill is analyzing how resource availability impacts organism growth in controlled investigations. Resources like water influence growth by providing essential elements for processes such as cell division and nutrient uptake, where optimal levels support maximum development while extremes can limit it. In this case, data on average height increases for bean plants show that 150 mL/week of water resulted in the greatest growth, indicating it as the optimal level in the study. To check understanding, compare the height increase values across water groups and identify the one with the highest metric as the most supportive. A common misconception is that all plants will grow equally regardless of resources due to age, but growth varies based on resource availability. Generally, organism growth depends on having adequate resources to meet biological needs. When resources are limited or excessive, growth is hindered, but balanced availability promotes healthy expansion.

Question 3

A class raised 4 groups of mealworms for 3 weeks. Each group started with mealworms of the same average mass. The only difference was the amount of food provided each day. The bar graph shows the average mass after 3 weeks.

Which food level supports the most growth based on the data and evidence?

The class notes that resources can limit or support growth.

  1. 1 g/day
  2. 8 g/day
  3. 2 g/day
  4. 4 g/day (correct answer)
Explanation: The core skill is understanding how resources like food affect the growth of organisms such as mealworms. Resources influence growth by supplying energy and nutrients for metabolism and tissue building, where insufficient amounts restrict mass gain. Data from bar graphs illustrate this effect by displaying higher average masses at certain food levels, identifying the amount that yields the most growth. To check understanding, analyze the graph to find the peak mass and confirm it aligns with the resource level tested. A common misconception is that the highest resource amount always produces the best results, but beyond an optimal point, additional food may not enhance growth further. In general, growth depends on resource availability, with limited food slowing development and adequate supplies promoting healthy increases. This principle applies across species, emphasizing resource management in ecosystems.

Question 4

A student compared mushroom growth in containers with different moisture levels for 12 days. Temperature, light, and starting mass were the same. The line graph shows average mushroom mass.

Which statement about growth is supported by the data and evidence?

The student concludes that resources can limit or support growth.

  1. The mushrooms in high moisture grew more at every time point, so more moisture would always keep increasing growth with no limit.
  2. By day 12, medium moisture and high moisture resulted in about the same mushroom mass, suggesting extra moisture did not increase growth beyond that point. (correct answer)
  3. Because the mushrooms look larger in high moisture, they must have grown more even if the mass data were the same.
  4. The mushrooms grew because they wanted more resources, so moisture level is not related to growth.
Explanation: The core skill is understanding how resources like moisture affect the growth of organisms such as mushrooms. Resources influence growth by facilitating hydration and nutrient absorption, but excess may not yield additional benefits. Data from line graphs illustrate this effect by tracking mass over time, revealing convergences at higher moisture levels. To check understanding, analyze trends to determine if extra resources enhance growth beyond certain points. A common misconception is that visible size differences always indicate mass growth, but data measurements provide accurate insights. In general, growth depends on resource availability, with balanced levels optimizing mass and overabundance offering no advantage. This highlights resource efficiency in fungal biology.

Question 5

A student tested how light (a resource) affects the growth of the same kind of seedlings. All seedlings started the same height and were measured after 10 days.

Table: Seedling height after 10 days

  • 2 hours of light/day: 4 cm
  • 6 hours of light/day: 9 cm
  • 10 hours of light/day: 12 cm
  • 14 hours of light/day: 11 cm

Resources such as light can limit or support growth.

Which claim about resources and growth is incorrect based on the data?

  1. Very low light (2 hours/day) was linked to the least growth in height.
  2. Seedlings grew more from 2 to 10 hours of light/day, showing light can support growth.
  3. The tallest seedlings were at 10 hours/day, so more light past that did not increase height in this test.
  4. Because 14 hours/day is more light than 10 hours/day, the 14-hour seedlings should be the tallest. (correct answer)
Explanation: The core skill in middle school life science is understanding how resources affect the growth of organisms. Resources influence growth by enabling processes like photosynthesis in plants, where the amount provided can either support or limit height and health. Data from the seedling experiment describe this effect, with height increasing from 2 to 10 hours of light per day but slightly decreasing at 14 hours, showing a peak at moderate levels. To check this, review the table to find the light duration with the maximum height and note any incorrect claims assuming more is always better. A common misconception is that greater resource input always results in greater growth, but the data contradict this by showing reduced height with excessive light possibly due to stress. In general, growth depends on resource availability, balancing scarcity that hinders energy production and overload that causes damage. Therefore, organisms thrive when resources are provided in amounts that match their biological needs.

Question 6

A student grew the same type of bean plant for 14 days. The only thing changed was how much water each plant received each day. Use the data as evidence to answer the question.

Table: Bean plant height after 14 days

  • 10 mL water/day: 6 cm
  • 30 mL water/day: 14 cm
  • 60 mL water/day: 13 cm
  • 90 mL water/day: 8 cm

Resources such as water can limit or support growth.

Which statement about water (a resource) and plant growth is supported by the data?

  1. The more water a plant gets, the taller it will always grow with no limits.
  2. Plants grew tallest at 30 mL/day, showing that too little or too much water can limit growth. (correct answer)
  3. All plants grew to the same height because growth is random and does not depend on resources.
  4. The plants that were taller must have had better genes, so water did not affect growth.
Explanation: The core skill in middle school life science is understanding how resources affect the growth of organisms. Resources influence growth by providing necessary elements for survival and development, but imbalances can restrict or enhance it depending on the amount available. Data from the bean plant experiment show this effect, with plants reaching maximum height at 30 mL of water per day and reduced heights at lower or higher amounts, indicating an optimal resource level. To check this, examine the data table for patterns where growth increases up to a point and then declines with excess resources. A common misconception is that unlimited resources always lead to unlimited growth, but the data reveal that too much water can harm plants by causing issues like drowning roots. In general, the growth of organisms depends on the availability of resources, where too little limits basic needs and too much can create stress. Therefore, optimal resource levels are crucial for supporting maximum growth in living systems.

Question 7

A class investigated how the number of yeast cells changes when sugar (a resource) is available at different concentrations. The same volume of yeast culture was used in each container, and cell count was measured after 12 hours.

Table: Yeast cell count after 12 hours

  • 0% sugar: 1.0 million cells
  • 2% sugar: 3.5 million cells
  • 5% sugar: 4.0 million cells
  • 10% sugar: 3.8 million cells

Resources can limit or support growth.

Choose the ONE supported conclusion based on the data.

  1. Because 5% sugar has the highest count, sugar is the only resource yeast ever needs to grow.
  2. Yeast growth increased from 0% to 5% sugar, but did not continue increasing at 10%, showing more resource does not always mean more growth. (correct answer)
  3. Sugar is not related to yeast growth because the counts are all close to each other.
  4. At 10% sugar the yeast decided to stop growing, so intent explains the change.
Explanation: The core skill in middle school life science is understanding how resources affect the growth of organisms. Resources influence growth by providing energy sources for reproduction and population increase, with concentrations affecting cell counts in microbes. Data from the yeast experiment show this effect, with cell counts rising from 0% to 5% sugar but stabilizing or slightly dropping at 10%, indicating a non-linear relationship. To check this, evaluate the table for peak growth and assess conclusions that align with observed patterns. A common misconception is that organisms intentionally control growth, but changes are due to resource interactions, not decisions. In general, growth depends on resource availability, where moderate levels often maximize output while extremes limit it. Therefore, understanding resource thresholds supports better predictions of microbial growth.

Question 8

A student grew the same type of mushroom culture for 6 days with different amounts of moisture (water availability). Mass was measured on Day 6.

Table: Mushroom mass on Day 6

  • Dry: 2 g
  • Moderate moisture: 9 g
  • Very wet: 6 g

Resources can limit or support growth.

If the student repeats the experiment and changes the "very wet" condition to "slightly wet" (less water than very wet but more than moderate), which prediction is best supported by the data?

  1. The mass will definitely be greater than 9 g because more water always increases growth.
  2. The mass will likely be between 6 g and 9 g because the data show growth was highest at moderate moisture, and too much water reduced growth. (correct answer)
  3. The mass will be 2 g because mushrooms only grow when they are dry.
  4. The mass cannot be predicted from data because resources do not affect growth.
Explanation: The core skill in middle school life science is understanding how resources affect the growth of organisms. Resources influence growth by providing essentials like water for hydration, with amounts determining mass outcomes in fungi. Data from the mushroom experiment show this effect, with moderate moisture yielding the highest mass and extremes reducing it, supporting predictions for intermediate levels. To check this, use table patterns to predict growth for new conditions between tested amounts. A common misconception is that more resources invariably increase growth, but data indicate optimal points prevent issues like oversaturation. In general, growth depends on resource availability, balancing needs to avoid limitations or excesses. Therefore, predicting based on data helps manage resources for better growth.

Question 9

A student is planning a follow-up experiment about oxygen (a resource) and fish growth. In the first experiment, fish in Tank A had higher oxygen and ended with greater mass than fish in Tank B. However, the student also used a larger tank for Tank A.

Resources can limit or support growth.

Which is the best reason the first experiment does NOT provide strong evidence that oxygen alone caused the growth difference?

  1. The student changed more than one variable (oxygen level and tank size), so the growth difference could be due to either resource-related condition. (correct answer)
  2. Fish growth is always random, so no experiment can show resource effects.
  3. Fish that grew more must have had better genes, so oxygen cannot affect growth.
  4. If oxygen is a resource, then higher oxygen must always cause unlimited growth.
Explanation: The core skill in middle school life science is understanding how resources affect the growth of organisms. Resources influence growth by factors like oxygen supporting respiration, but experiments must isolate variables to confirm effects. Data from flawed experiments may not clearly show this effect if multiple changes, such as tank size and oxygen, confound results. To check this, review experimental design for controlled variables to ensure evidence points to a single resource. A common misconception is that any growth difference proves a resource's role, ignoring other variables. In general, growth depends on resource availability, but reliable evidence requires fair testing. Therefore, proper experiments are essential for demonstrating resource impacts on growth.

Question 10

A student investigated how resource availability affects algae growth. Each jar started with the same amount of algae and was kept in the same location. The student changed two things: nutrient level (low vs. high) and light level (low vs. high). After 7 days, the student measured algae density (cells/mL). Resources can limit or support growth. Which is the best error detection based on the data and setup?

  1. The experiment cannot show the effect of nutrient level alone because light level also changed. (correct answer)
  2. The experiment is invalid because algae growth must be explained only by genetics.
  3. The results should be ignored because the jars look similar, so growth must be the same.
  4. Seven days is enough time to prove algae will keep increasing forever if resources are high.
Explanation: This question tests experimental design understanding when studying how resources affect growth. When investigating resource effects, scientists must change only one variable at a time to determine cause and effect relationships. The student changed both nutrient level AND light level between jars, making it impossible to determine which resource caused the observed differences in algae density. To identify this error, check what variables differ between groups - proper experiments would test nutrients with constant light, or light with constant nutrients. Some students think any growth difference must be due to genetics alone, but environmental resources clearly affect growth when properly tested. This experimental flaw demonstrates why controlling variables is crucial - without proper controls, we cannot determine whether nutrients, light, or their interaction caused the growth differences.

Question 11

A class tested how a resource affects yeast population growth. Each flask started with the same number of yeast cells and the same amount of water. The only difference was sugar concentration (a resource). After 6 hours, students counted yeast cells (millions). Resources can limit or support growth. Which statement about growth is supported by the data?

  1. Yeast grew most at 8% sugar, and growth was lower at 12% sugar than at 8% sugar. (correct answer)
  2. More sugar will always increase yeast growth without any limit.
  3. The yeast with 0% sugar must have grown less because they were younger yeast cells.
  4. Because yeast cells increased in every flask, sugar is not a resource that affects growth.
Explanation: This question tests understanding how sugar concentration as a resource affects yeast population growth. Resources provide the materials and energy organisms need to reproduce and increase their numbers. The data reveal an important pattern: yeast growth increased from 0% sugar (2 million cells) to 8% sugar (45 million cells), but then decreased at 12% sugar (28 million cells), showing that too much sugar can actually limit growth. To verify this relationship, compare the cell counts and note that 8% sugar produced the highest growth, not 12%. A common misconception is that more resources always mean more growth, but this demonstrates that organisms have optimal resource levels. This experiment illustrates that growth depends on appropriate resource availability - both too little and too much of a resource can limit growth compared to an optimal level.

Question 12

A class studied how resource availability affects duckweed growth. Each container started with the same amount of duckweed. The only difference was nitrate level in the water (a resource). After 10 days, students measured duckweed mass (g). Resources can limit or support growth. Which prediction is best supported by the data if a new container is set to 2 mg/L nitrate?

  1. It will have a final mass between the 0 mg/L and 4 mg/L groups. (correct answer)
  2. It will have the same final mass as the 8 mg/L group because any nitrate amount causes maximum growth.
  3. It will have the lowest mass because adding any nitrate makes duckweed stop growing.
  4. It will have a completely unpredictable mass because growth does not depend on resources.
Explanation: This question tests prediction skills based on understanding how nitrate resources affect duckweed growth patterns. Nitrate is a key nutrient resource that aquatic plants like duckweed need to build proteins and grow. The data show a clear trend: duckweed mass increases from 0 mg/L (1.2 g) to 4 mg/L (3.8 g) to 8 mg/L (5.5 g), demonstrating a positive relationship between nitrate availability and growth. To predict the mass at 2 mg/L, recognize that this value falls between 0 and 4 mg/L, so the mass should fall between 1.2 g and 3.8 g - likely around 2.5 g. Some students incorrectly think any amount of nutrient causes maximum growth or that nutrients stop growth, but the data show a gradual increase. This pattern demonstrates that growth increases proportionally with resource availability within the tested range, allowing reasonable predictions for intermediate values.

Question 13

Students tested how light affects growth of the same species of algae in identical containers for 10 days. All containers had the same water, nutrients, and temperature. The line graph shows algae concentration over time.

Which claim about resources and growth is incorrect based on the data and evidence?

Students state that resources can limit or support growth.

  1. The algae grew fastest under medium light during the first 6 days.
  2. High light did not lead to higher algae concentration than medium light by day 10.
  3. More light always causes more growth, so the high-light group must end with the greatest algae concentration. (correct answer)
  4. Low light supported less growth than medium light by day 10.
Explanation: The core skill is understanding how resources like light affect the growth of organisms such as algae. Resources influence growth by enabling processes like photosynthesis, where varying intensities can either support or hinder population increases over time. Data from line graphs demonstrate this effect by tracking algae concentration, showing differences in growth rates under low, medium, and high light conditions. To check understanding, evaluate claims against the graph's trends, identifying any that contradict the observed data patterns. A common misconception is that more of a resource always equates to more growth, but excessive light can stress organisms without additional benefits. In general, growth depends on resource availability, with optimal levels maximizing development while extremes limit it. This concept extends to various environmental factors in life science studies.

Question 14

A student claims: "If plants don't grow much, it's always because they are unhealthy." The student tested plant growth with different amounts of soil nitrogen (a nutrient resource). All plants were measured after 30 days.

Bar graph data (average mass in grams):

  • Low nitrogen: 9 g
  • Medium nitrogen: 15 g
  • High nitrogen: 14 g

Resources can limit or support growth.

Which statement best evaluates the claim using evidence from the data?

  1. The claim is not supported because plants can have lower mass when a resource (nitrogen) is limited, even without evidence about health. (correct answer)
  2. The claim is not supported because differences in mass must be caused only by genetics.
  3. The claim is supported because any smaller plant must be unhealthy, no matter what the resource level is.
  4. The claim is supported because medium nitrogen caused the most growth, proving nitrogen is the only cause of plant size.
Explanation: The core skill in middle school life science is understanding how resources affect the growth of organisms. Resources influence growth by supplying nutrients like nitrogen for protein synthesis, with varying amounts impacting mass without necessarily affecting health. Data from the plant experiment describe this effect in bar graphs, where medium nitrogen yields the highest mass, challenging claims linking small size solely to unhealthiness. To check this, compare masses across resource levels to evaluate if limitations explain size differences without health assumptions. A common misconception is that poor growth always means disease, but the data show resource scarcity as a key factor. In general, growth depends on resource availability, where low levels restrict mass gain independently of other health aspects. Therefore, resources must be considered when assessing organism development.

Question 15

Yeast were grown for 24 hours in containers with different amounts of sugar (a food resource). The graph shows the yeast population size over time.

Which sugar level supports the most growth by 24 hours, based on the data and evidence? (Resources can limit or support growth.)

  1. 0% sugar
  2. 5% sugar (correct answer)
  3. 2% sugar
  4. 10% sugar
Explanation: The core skill is interpreting data to determine how resources affect population growth in microorganisms. Resources such as sugar influence growth by serving as energy sources for reproduction and metabolism, with varying concentrations limiting or supporting population increases. The graph data reveal that the 5% sugar level resulted in the largest yeast population by 24 hours, demonstrating it supported the most growth. To verify, examine the population sizes at the 24-hour mark across sugar levels and select the highest value. One misconception is that higher resource amounts always yield more growth, but excessive sugar can inhibit due to osmotic stress. In general, growth in populations relies on resource availability matching the organism's needs. Optimal resources enhance growth, while scarcity or overload restricts it.

Question 16

A student grew the same type of bean seedlings for 12 days. The only difference was the amount of light per day (a resource): 4 hours, 8 hours, or 12 hours. Growth was measured as average height (cm) each day. Resources can limit or support growth. Based on the line graph, which statement about light and growth is supported by evidence?

  1. Seedlings under 12 hours of light were taller than the other groups on most days measured. (correct answer)
  2. All seedlings grew at the same rate because they are the same age, so light does not matter.
  3. The 4-hour group is healthier because it is shorter, and shorter always means healthier.
  4. Because the seedlings grew from Day 1 to Day 12, light cannot be a limiting resource.
Explanation: This question examines how light as a resource affects plant growth by comparing seedling heights over time. Light is a critical resource for plants because it provides energy for photosynthesis, which drives growth and development. The line graph shows three distinct growth curves: seedlings with 12 hours of light per day consistently reached greater heights than those with 8 or 4 hours throughout the entire measurement period. To verify this, trace each line and compare heights at any given day - the 12-hour group is always tallest. Some students mistakenly think shorter plants are healthier or that all plants grow equally regardless of conditions, but this data proves light availability directly impacts growth rate. The experiment demonstrates that when light is limited (4 hours), growth is restricted, while more light (up to 12 hours tested) supports greater growth in these seedlings.

Question 17

A student grew the same type of grass in trays for 3 weeks. The trays received different amounts of sunlight per day. The graph shows the average grass height each week.

Which prediction is best supported by the data and evidence if the student added a new tray with 10 hours/day of sunlight? (Resources can limit or support growth.)

  1. It would likely have a week-3 height between the 8-hour and 12-hour trays. (correct answer)
  2. It would likely have the same height as the 4-hour tray because growth is random.
  3. It would likely be taller than the 12-hour tray because more sunlight always increases growth.
  4. It would likely be shorter than all other trays because any change in resource makes growth decrease.
Explanation: The core skill is making predictions based on patterns in resource-growth data. Resources like sunlight influence growth by fueling photosynthesis, with increasing amounts typically supporting more growth up to a point. The graph data on grass height show a trend of greater height with more sunlight hours, suggesting a 10-hour tray would fall between 8-hour and 12-hour results. To check, analyze the height pattern and interpolate for intermediate values. A misconception is that more resources infinitely increase growth, but plateaus or declines can occur. Generally, growth depends on resource availability matching needs. Optimal availability promotes growth, while deviations limit it.

Question 18

A student grew the same kind of grass in trays for 3 weeks. The only difference was fertilizer level (a resource that provides nutrients). The student measured average grass height each week.

Line graph data (cm):

  • Low fertilizer: Week 1 = 3, Week 2 = 5, Week 3 = 6
  • Medium fertilizer: Week 1 = 4, Week 2 = 8, Week 3 = 10
  • High fertilizer: Week 1 = 4, Week 2 = 7, Week 3 = 8

Resources can limit or support growth.

Which statement about growth is supported by the data?

  1. High fertilizer produced the greatest height at every week, so more nutrients always mean more growth.
  2. Medium fertilizer resulted in the tallest grass by Week 3, showing that resource level can affect growth outcomes. (correct answer)
  3. Because the grass grew over time, fertilizer did not matter; growth happens only because of age.
  4. The differences must be caused by genetics because all trays received fertilizer.
Explanation: The core skill in middle school life science is understanding how resources affect the growth of organisms. Resources influence growth by delivering nutrients that fuel cell division and expansion, with different levels producing varying heights over time. Data from the grass experiment describe this effect through line graphs showing medium fertilizer yielding the tallest grass by Week 3, surpassing low and high levels. To check this, trace the growth trends on the graph to see where resource levels optimize height without diminishing returns. A common misconception is that higher resource amounts always equate to better growth, but the data show high fertilizer leading to less height possibly due to nutrient burn. In general, growth depends on resource availability, optimizing between deficiency that stunts and excess that harms. Therefore, balanced resources are essential for supporting sustained growth in plants.

Question 19

Students grew the same kind of grass in trays for 3 weeks. They changed only the amount of nitrogen in the soil. Light and water were kept the same. The bar graph shows average grass height after 3 weeks.

If the nitrogen level were changed from 1 unit to 2 units, which prediction about growth is supported by the data and evidence?

Students state that resources can limit or support growth.

  1. Height would likely increase, because the 2-unit group is taller than the 1-unit group. (correct answer)
  2. Height would double, because doubling a resource always doubles growth.
  3. Height would stay exactly the same, because growth depends only on the grass's traits, not resources.
  4. Height would likely decrease, because any added nitrogen always harms growth.
Explanation: The core skill is understanding how resources like nitrogen affect the growth of organisms such as grass. Resources influence growth by aiding in protein synthesis and chlorophyll production, promoting height increases when adequately supplied. Data from bar graphs demonstrate this effect by comparing average heights, supporting predictions for changes in resource levels. To check understanding, use trends in the graph to forecast outcomes for untested amounts, ensuring logical extensions. A common misconception is that doubling resources always doubles growth, but effects diminish beyond optimal points. In general, growth depends on resource availability, with increases supporting better development up to saturation. This concept is vital for agriculture and ecology.

Question 20

Three fish tanks each started with 10 guppies. The only difference was the amount of fish food added each day. After 8 weeks, the student counted the number of guppies.

Which statement about resource availability and growth of the population is supported by the data and evidence? (Resources can limit or support growth.)

  1. The tank with the most food had the largest population after 8 weeks, showing food supported more population growth in this investigation. (correct answer)
  2. All tanks should have the same number of guppies because they started with the same number.
  3. The tank with less food had fewer guppies only because the guppies chose not to grow the population.
  4. The results prove that food is the only factor that can ever affect guppy population size.
Explanation: The core skill is drawing conclusions from data on how resources affect population growth. Resources like food influence growth by providing energy for reproduction, with higher availability often supporting larger populations in limited environments. The counting data after 8 weeks show that the tank with the most food had the largest guppy population, indicating food supported more growth. A strategy to check is comparing final population sizes across food levels to identify the resource correlation. A misconception is that starting with equal numbers ensures equal outcomes regardless of resources, but availability drives differences. Overall, population growth hinges on resource availability. Sufficient resources enable expansion, while limitations constrain it.