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HEC ETC - USAT GS Entry Test - Biology - Ecosystem - Quiz 1

Practice 10 high yield MCQs on Biology from Chapter Ecosystem for USAT GS Entry Test. After submission, get instant results with correct answers and detailed explanations. This is Quiz 1 of the series.

1. What is an ecosystem?



2. What are the living components of an ecosystem called?



3. What is the difference between habitat and niche?



4. What is a food chain?



5. What is the correct order of trophic levels in a food chain?



6. What percentage of energy is transferred from one trophic level to the next?



7. What is the ultimate source of energy for most ecosystems?



8. What is a food web?



9. Why is a food web more accurate than a food chain?



10. How does a food web affect ecosystem stability?



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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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