In the dry weight of living beings,$A$ $\%$ carbon is present. In the oceans,$B$ $\%$ of the total global carbon is dissolved. The total amount of carbon in the atmosphere is $C$ $\%$ of the total global carbon. Identify the correct values for $A, B,$ and $C$.

$X-$ Atmospheric input of phosphorus through rainfall is much smaller than carbon input.
$Y-$ The exchange of phosphorus between organisms and the environment is negligible.

The 'Reed-swamp' stage refers to which of the following?

Choose the correct sequence of True $(T)$ and False $(F)$ statements:
$(1)$ Zooplanktons are primary producers in an aquatic ecosystem.
$(2)$ Decomposition is largely an oxygen-requiring process.
$(3)$ In a natural ecosystem, fishes, wolf, etc., are carnivores.
$(4)$ The amount of energy decreases at each successive trophic level.

In the carbon cycle,the source of carbon for plants is:

Which of the following represents a tertiary consumer and a secondary consumer,respectively?