Question

In a pond ecosystem, ____A____ are producers, ____B____ are primary consumers and ____C_____ are secondary consumers.

• A. A - zooplanktons, B -phytoplanktons, C -fishes
• B. A - zooplanktons, B - fishes, C - phytoplankton
• C. A - phytoplanktons, B - zooplanktons, C - fishes
• D. A - fishes, B - zooplanktons, C - phytoplanktons

Answer 1

The correct option is C A - phytoplanktons, B - zooplanktons, C - fishes

Pond ecosystem is an example of aquatic ecosystem which comprises both biotic (living) and abiotic components (non-living). Abiotic components include water, soil, deposited at the bottom of the pond, sunlight, etc. The biotic components of the pond ecosystem include producers, consumers and decomposers.
Phytoplanktons, some algae, floating plants, submerged plants, plants found at the edges of the pond, etc. are the autotrophic components i.e the producers. They convert carbon dioxide in atmosphere to glucose by the process of photosynthesis.
Zooplanktons represent the primary consumers. They obtain nourishment from the producers directly.
Free-swimming animals such as fishes and the bottom dwelling animals such as crayfish, feed on the zooplankton. Hence they are the secondary consumers.