Question

Phytoplankton are

• A. Heterotrophs
• B. Saprotrophs
• C. Autotrophs
• D. All the above

Answer 1

The correct option is C Autotrophs

In a pond ecosystem the primary producers are phytoplankton. They are autotrophs. They synthesize their own food using solar energy by the process of photosynthesis. Zooplanktons are primary consumers. They feed on phytoplankton. Fishes are secondary consumers. They feed on zooplanktons. Zooplankton and fishes are heterotrophs. Decomposers are organisms that feed on dead animals and plants. They break down the organic matter. They are saprotrophs.

Thus, the correct answer is 'Autotrophs.'