Multiple choice

Phytoplanktons in a plant ecosystem are :

  1. osmotrophs

  2. heterotrophs

  3. autotrophs

  4. lithotrophs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phytoplankton produce their required sugar through photosynthesis. As they are able to produce their own energy with the help of light, they are considered autotrophic (self-feeding). Phytoplankton and other autotrophs are called primary producers, and make up the bottom of the food web.

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