The exchange pool in the carbon cycle is:

Which of the following statements is incorrect regarding the phosphorus cycle?

Give scientific reasons: Coral reefs are not found in the regions from West Bengal to Andhra Pradesh,but are found in Tamil Nadu and on the east coast of India.

$A$ person who eats vegetables acts as a:

Which one statement is correct regarding man-made ecosystems?

The following chart shows the phosphorus cycle in a terrestrial ecosystem. Select the correct option for the four labels $a, b, c$ and $d$ shown in the diagram.
$a$ - $b$ - $c$ - $d$