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Indiana State Assessments · ILEARN Biology ECA

Indiana ILEARN Biology ECA Practice Test

Build Indiana Biology readiness with five focused 10-question practice sets covering cells, genetics, ecology, evolution, energy, scientific practices, data, and evidence.

Indiana ILEARN Biology ECA practice sets

This Indiana ILEARN Biology ECA Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets cover cells and genetics, ecology and evolution, matter and energy in organisms, scientific practices and data, and integrated biology review.

Biology ECA skills

The Indiana Department of Education identifies ILEARN Biology as an end-of-course assessment completed after students finish a high school Biology course. These supplemental sets practice biological systems, heredity, energy and matter, ecology, evolution, models, data analysis, and evidence-based explanations.

How to use this page

Complete one 10-question set at a time. Read every model, graph, table, and evidence statement carefully, then review the explanation after each response.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Indiana Department of Education guidance, official materials, accommodations, or testing procedures.

For broader grade-level study paths, explore Elementary School Tests, Middle School Tests, and High School Tests.

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Indiana ILEARN Biology ECA Practice Questions

A 10-question Indiana ILEARN Biology ECA practice set on ecology and evolution, with answers and explanations.

Read each scenario, model, data table, or investigation 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 producers in most ecosystems?

Please select an answer first.

Correct answer: A

The correct answer is They convert energy into food..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Producers such as plants use light or chemical energy to make food.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Producers such as plants use light or chemical energy to make food.

2. QuestionMultiple choice

What happens to available energy as it moves up a food chain?

Please select an answer first.

Correct answer: B

The correct answer is Less energy is available at higher trophic levels..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Energy is transferred with losses, so less is available to organisms at higher levels.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Energy is transferred with losses, so less is available to organisms at higher levels.

3. QuestionMultiple choice

Why are decomposers important in an ecosystem?

Please select an answer first.

Correct answer: C

The correct answer is They recycle matter from dead organisms..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Decomposers break down dead material and return nutrients to the environment.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Decomposers break down dead material and return nutrients to the environment.

4. QuestionMultiple choice

A drought reduces the number of grasses in a prairie. Which population may decrease because of less food?

Please select an answer first.

Correct answer: D

The correct answer is Grasshoppers.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Grasshoppers depend on plants for food, so fewer grasses can reduce their population.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Grasshoppers depend on plants for food, so fewer grasses can reduce their population.

5. QuestionMultiple choice

What is natural selection?

Please select an answer first.

Correct answer: A

The correct answer is A process in which helpful inherited traits become more common over generations..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Individuals with traits that improve survival and reproduction may leave more offspring.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Individuals with traits that improve survival and reproduction may leave more offspring.

6. QuestionMultiple choice

Which evidence supports common ancestry among different species?

Please select an answer first.

Correct answer: B

The correct answer is Similar DNA or protein sequences.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Shared molecular sequences can indicate that species inherited information from a common ancestor.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Shared molecular sequences can indicate that species inherited information from a common ancestor.

7. 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. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Carrying capacity depends on available resources and limiting conditions.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Carrying capacity depends on available resources and limiting conditions.

8. QuestionMultiple choice

Which relationship benefits both organisms?

Please select an answer first.

Correct answer: D

The correct answer is Mutualism.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Mutualism is a relationship in which both organisms benefit.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Mutualism is a relationship in which both organisms benefit.

9. QuestionMultiple choice

A population becomes separated by a mountain range and eventually develops different traits. What may this separation reduce?

Please select an answer first.

Correct answer: A

The correct answer is Gene flow between the populations.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: A physical barrier can reduce mating and gene flow between populations.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

A physical barrier can reduce mating and gene flow between populations.

10. QuestionMultiple choice

Why can biodiversity make an ecosystem more resilient?

Please select an answer first.

Correct answer: B

The correct answer is Different organisms may respond differently to a disturbance..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: A variety of organisms and roles can help an ecosystem recover from disturbance.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

A variety of organisms and roles can help an ecosystem recover from disturbance.

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Frequently asked questions about Indiana ILEARN Biology ECA Practice

When is the Indiana Biology ECA taken?

The Indiana Department of Education identifies the Biology End-of-Course Assessment as an ILEARN assessment taken upon completion of the high school Biology course. Check the official ILEARN page for current participation guidance.

Which biology skills are included?

The practice sets include cells, genetics, ecology, evolution, matter and energy, homeostasis, scientific practices, data analysis, models, and evidence-based reasoning.

Are these official Biology ECA questions?

No. These are original supplemental practice questions. Check the official Indiana Department of Education ILEARN page for current blueprints, released items, accommodations, and testing procedures.