Nutrient Cycles

Which one of the following will accelerate phosphorus cycle?

In the given diagram, some labels are missing. Identify them and select the correct option:

Correct statements among the following are:

I. Atmospheric input of phosphorous through rainfall is much smaller than carbon.

II. Gaseous exchange of phosphorous between organism and environment is negligible.

III. Herbivores and other animals obtain phosphorous through their foods.

IV. A considerable amount of carbon returns into the atmosphere through the burning of fossil fuels.

Phosphorus is major component of

Which one is odd w.r.t. gaseous cycle?

Atmospheric input is negligible in

Consider the following statements about carbon cycle and choose how many statements are correct?
(a) Atmosphere has $71\%$ of total global carbon.
(b) Decomposers contribute substantially to ${\mathrm{CO}}_2$ pool by their processing of waste materials and dead organic matter of land or oceans.
(c) $4\times {10}^{13} \mathrm{kg}$ carbon is fixed through photosynthesis annually.
(d) No respiratory input into atmosphere.
(e) Carbon constitutes $49\%$ of dry wt. of organisms.

Major utilisation of carbon from the atmosphere is through:

In an ecosystem, the cycling of nutrients is not known as

About 70% of the total global carbon is formed in                      .

In sedimentary cycles, the reserve pool is

Concentration of nitrogen remains constant by

Assertion : Excess of sulphur reaches to reservoir pool.
Reason : Thiobacillus and Desulfovibrio convert elemental sulphur into the sulphate.

Study the cycle shown below and select the option which gives correct words for all the four blanks $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$.

Phosphorus cycles in the form of

Which of the following is NOT true for the biogeochemical cycle according to the following cycle

Phosphorus of ocean becomes available to land plants due to

Phosphorus cycle is