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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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5. Test

Indiana ILEARN Biology ECA Practice Questions

A 10-question Indiana ILEARN Biology ECA practice set on integrated biology eca review, 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

A plant is placed in darkness and produces less sugar. Which process is most directly affected?

Please select an answer first.

Correct answer: A

The correct answer is Photosynthesis.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Photosynthesis requires light energy to produce sugars.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Photosynthesis requires light energy to produce sugars.

2. QuestionMultiple choice

A cell has a damaged mitochondrion. Which function may be reduced?

Please select an answer first.

Correct answer: B

The correct answer is Usable energy production.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Mitochondria are important sites for releasing usable energy from food.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Mitochondria are important sites for releasing usable energy from food.

3. QuestionMultiple choice

A bird population has a beak shape that helps it open a common seed. Over generations, what may happen?

Please select an answer first.

Correct answer: C

The correct answer is The helpful beak trait may become more common..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Birds with a helpful inherited trait may survive and reproduce more successfully.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Birds with a helpful inherited trait may survive and reproduce more successfully.

4. QuestionMultiple choice

A data table shows that enzyme activity rises to 37 degrees Celsius and then falls sharply. What is a reasonable explanation?

Please select an answer first.

Correct answer: D

The correct answer is The enzyme may work best near 37 degrees and lose function at higher temperatures..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: The pattern suggests an optimum range and possible denaturation at higher temperature.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

The pattern suggests an optimum range and possible denaturation at higher temperature.

5. QuestionMultiple choice

A food web loses its main producer. What is a likely effect?

Please select an answer first.

Correct answer: A

The correct answer is Less energy enters the food web..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Producers introduce energy into most food webs, so their loss affects consumers.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Producers introduce energy into most food webs, so their loss affects consumers.

6. QuestionMultiple choice

A student compares DNA sequences from two species and finds many similarities. What can this evidence suggest?

Please select an answer first.

Correct answer: B

The correct answer is The species may share a common ancestor..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Shared DNA sequences can support an inference of common ancestry.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Shared DNA sequences can support an inference of common ancestry.

7. QuestionMultiple choice

A cell is placed in a solution with a higher solute concentration outside the cell. What may happen to water?

Please select an answer first.

Correct answer: C

The correct answer is Water may move out of the cell by osmosis..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Water moves across a selectively permeable membrane toward the area with greater solute concentration.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Water moves across a selectively permeable membrane toward the area with greater solute concentration.

8. QuestionMultiple choice

Why is a control group useful in a biology investigation about a new treatment?

Please select an answer first.

Correct answer: D

The correct answer is It helps show what happens without the treatment..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Comparing treatment and control groups helps identify effects associated with the treatment.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Comparing treatment and control groups helps identify effects associated with the treatment.

9. QuestionMultiple choice

A population exceeds its carrying capacity. Which outcome is likely if resources remain limited?

Please select an answer first.

Correct answer: A

The correct answer is Competition and resource shortages may increase..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Limited resources can increase competition and cause population decline.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Limited resources can increase competition and cause population decline.

10. QuestionMultiple choice

What is the best general strategy for an Indiana Biology ECA practice question?

Please select an answer first.

Correct answer: B

The correct answer is Use the model or data, identify the biological relationship, and choose the explanation supported by evidence..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Biology reasoning depends on connecting evidence to mechanisms, systems, and biological principles.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Biology reasoning depends on connecting evidence to mechanisms, systems, and biological principles.

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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.