HESI A2 Exam Prep 2026

Real HESI A2 Questions.
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Practice with exam-accurate HESI A2 questions that match the real test in format, difficulty, and logic. Trusted by students accepted into nursing programs across the United States.

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About Ecology

Decomposers break down dead organic matter and recycle nutrients, supporting ecosystem nutrient cycles.

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Ecology HESI A2 Practice Questions

Free Ecology practice questions for the HESI A2 exam with detailed rationales.

Question 1 of 2

Which of the following best describes the role of decomposers in an ecosystem?
They produce energy through photosynthesis.
They consume primary producers to regulate population sizes.
They compete with herbivores for food resources.
They break down dead organic matter and recycle nutrients.