MCQ
Gonads develop from embryonic.
- AEctoderm.
- BEndoderm.
- CMesoderm.
- DBoth b) and c).
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$(1)$ Zooplanktons are primary producers in an aquatic ecosystem.
$(2)$ Decomposition is largely an oxygen requiring process.
$(3)$ In a natural ecosystem, fishes, wolf, etc. are carnivore.
$(4)$ The amount of energy decreases in each successive trophic level.