Gujarati
12.Ecosystem
normal

In carbon cycle, source of carbon to plants is

A

Atmospheric $CO_2$

B

Carbonate rocks

C

Fossil fuels

D

All of these

Solution

(a)Carbon present in the atmosphere and hydrosphere is available to the living world as free or dissolved $CO_2$. It is picked up by producers in the process of photosynthesis and changed to organic compounds.

Standard 12
Biology

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