Select the formula for ecological efficiency.
Select the formula for ecological efficiency.
- A
$\frac{\text { Gross primary productivity }}{\text { Incident total solar radiatio }} \times 100$
- B
$\frac{\text { Food energyassimilated }}{\text { Food energyingested }} \times 100$
- C
$\frac{\text { Net primary productivity }}{\text { Gross primary productivity }} \times 100$
- D
$\frac{\text { Energy $\in$biomass production at trophic level}}{\text { Energy $\in$biomass production at previoustrophic level }} \times 100$
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Out of the following biogeochemical cycles which one is gaseous?
$I.$ sulphur $II.$ Phosphorus
$III.$ nitrogen $IV.$ Carbon
Choose the correct option
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$I.$ sulphur $II.$ Phosphorus
$III.$ nitrogen $IV.$ Carbon
Choose the correct option
The two vegetation of ecosystem are separated by
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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 $CO_2$ pool by their processing of waste materials and dead organic matter of land or oceans
$(c)$ $4 × 10^{13}\; kg$ carbon is fixed through photo-synthesis annually
$(d)$ No respiratory input into atmosphere
$(e)$ Carbon constitutes $ 49\;\%$ of dry wt. of organisms
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$(a)$ Atmosphere has $71\;\%$ of total global carbon
$(b)$ Decomposers contribute substantially to $CO_2$ pool by their processing of waste materials and dead organic matter of land or oceans
$(c)$ $4 × 10^{13}\; kg$ carbon is fixed through photo-synthesis annually
$(d)$ No respiratory input into atmosphere
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The vegetation of Delhi is chiefly
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