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Arkansas ATLAS · Biology EOC · Science

Arkansas ATLAS Biology EOC Practice Test

Build Biology Arkansas ATLAS EOC readiness with five focused 10-question practice sets covering cells, energy, genetics, evolution, ecology, biological systems, and scientific evidence.

Arkansas ATLAS Biology EOC practice sets

This Arkansas ATLAS Biology EOC Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets support supplemental review of cells, transport, homeostasis, energy, genetics, evolution, ecology, biodiversity, and biological evidence.

Biology skills covered

  • Cell structures, membrane transport, enzymes, homeostasis, specialization, and biological organization
  • Photosynthesis, cellular respiration, ATP, fermentation, chloroplasts, mitochondria, and limiting factors
  • DNA, RNA, mutations, inheritance, meiosis, mitosis, karyotypes, and genetic variation
  • Natural selection, adaptation, common ancestry, fossils, speciation, artificial selection, and biodiversity
  • Food webs, energy flow, carrying capacity, interactions, nutrient cycles, invasive species, variables, and evidence

How to use this page

Complete one 10-question set at a time. Identify the biological process, connect evidence to the model, and review the explanation for every missed or guessed answer.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Arkansas Department of Education ATLAS guidance, official blueprints, accommodations, or testing schedules.

For the broader Arkansas assessment hub, visit Arkansas State Assessments.

Select a test

5 Tests
1. Test2. Test3. Test4. Test5. Test

5. Test

Arkansas ATLAS Biology EOC Practice Questions

A 10-question Arkansas ATLAS Biology EOC practice set on ecology, systems, and biological evidence, with answers and explanations.

Read each biology scenario carefully, choose one answer, and review the explanation after responding.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is the role of a producer in an ecosystem?

Please select an answer first.

Correct answer: A

The correct answer is To make organic food from an energy source.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Producers such as plants and algae capture light or chemical energy and build organic molecules.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Producers such as plants and algae capture light or chemical energy and build organic molecules.

2. QuestionMultiple choice

Why is less energy available at higher trophic levels?

Please select an answer first.

Correct answer: B

The correct answer is Organisms use much of the energy for life processes and release heat.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Only a fraction of energy transfers between trophic levels, while much supports metabolism and leaves as heat.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Only a fraction of energy transfers between trophic levels, while much supports metabolism and leaves as heat.

3. QuestionMultiple choice

What is carrying capacity?

Please select an answer first.

Correct answer: C

The correct answer is The largest population an environment can support over time.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Carrying capacity depends on available resources, space, competition, predation, and environmental conditions.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Carrying capacity depends on available resources, space, competition, predation, and environmental conditions.

4. QuestionMultiple choice

Which relationship benefits both organisms?

Please select an answer first.

Correct answer: D

The correct answer is Mutualism.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: In mutualism, both organisms receive a benefit from the interaction.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

In mutualism, both organisms receive a benefit from the interaction.

5. QuestionMultiple choice

What happens to carbon dioxide during photosynthesis?

Please select an answer first.

Correct answer: A

The correct answer is It is incorporated into organic molecules such as glucose.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Plants use carbon dioxide as a carbon source when building glucose and other organic compounds.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Plants use carbon dioxide as a carbon source when building glucose and other organic compounds.

6. QuestionMultiple choice

How do decomposers affect nutrient cycles?

Please select an answer first.

Correct answer: B

The correct answer is They break down dead matter and return nutrients to the environment.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Decomposers release nutrients from dead organisms and waste so producers can use them again.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Decomposers release nutrients from dead organisms and waste so producers can use them again.

7. QuestionMultiple choice

A disease reduces a rabbit population. What is a likely short-term effect on the grass the rabbits eat?

Please select an answer first.

Correct answer: C

The correct answer is Grass may increase because fewer rabbits are consuming it.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Fewer herbivores can reduce grazing pressure, allowing plant biomass to increase temporarily.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Fewer herbivores can reduce grazing pressure, allowing plant biomass to increase temporarily.

8. QuestionMultiple choice

Which factor is density dependent?

Please select an answer first.

Correct answer: D

The correct answer is Competition for food.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Competition becomes stronger as population density increases, so it is density dependent.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Competition becomes stronger as population density increases, so it is density dependent.

9. QuestionMultiple choice

Why can an invasive species reduce native biodiversity?

Please select an answer first.

Correct answer: A

The correct answer is It may compete for resources, prey on native species, or introduce disease.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Invasive species can alter interactions and resource availability, placing pressure on native populations.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Invasive species can alter interactions and resource availability, placing pressure on native populations.

10. QuestionMultiple choice

A student tests whether fertilizer affects algae growth by using identical containers with different fertilizer amounts. What is the dependent variable?

Please select an answer first.

Correct answer: B

The correct answer is The amount of algae growth.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: The dependent variable is the measured response, which is algae growth in this investigation.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

The dependent variable is the measured response, which is algae growth in this investigation.

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Frequently asked questions about Arkansas ATLAS Biology EOC Practice Test

Which Biology skills are covered?

The page covers cells, transport, homeostasis, energy, genetics, evolution, ecology, biodiversity, body systems, and biological evidence.

How many questions are included?

There are five practice sets with 10 questions each, for 50 questions in total. Each set can be completed separately.

Are these official ATLAS questions?

No. These are original supplemental practice questions. Check the latest Arkansas Department of Education information for official materials, standards, accommodations, and policies.