Biology

Our Environment

Ecosystem, food chains, environmental issues.

Sample Practice Questions

3 questions shown — tap “Show Answer” to check yours.

Easy

Organisms that produce their own food are called:

AConsumers

BDecomposers

CProducers

DPredators

Easy

The percentage of energy transferred from one trophic level to the next is approximately:

A1%

B10%

C50%

D90%

Easy

Ozone layer depletion is mainly caused by:

ACO₂

BCFCs

CNO₂

DSO₂

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