The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
Write a food chain comprising of all the four organisms mentioned.

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Solution

The food chain forming from the given organisms is:

Phytoplankton $\to$ Water beetle $\to$ Tadpole $\to$ Fish

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The food chain forming from the given organisms is:​ Phytoplankton → Water beetle → Tadpole → Fish​

The food chain forming from the given organisms is:

Phytoplankton $\to$ Water beetle $\to$ Tadpole $\to$ Fish