Match the Column-$I$ with Column-$II$ and choose the correct option.
Column-$I$ Column-$II$ $(a)$ $\text{NPP}$ of ocean $(i)$ $115$ billion tons $(b)$ Annual $\text{NPP}$ of the whole biosphere $(ii)$ $170$ billion tons $(c)$ $\text{NPP}$ of terrestrial ecosystem $(iii)$ $55$ billion tons $(d)$ Secondary productivity $(iv)$ Heterotrophs
| Column-$I$ | Column-$II$ |
| $(a)$ $\text{NPP}$ of ocean | $(i)$ $115$ billion tons |
| $(b)$ Annual $\text{NPP}$ of the whole biosphere | $(ii)$ $170$ billion tons |
| $(c)$ $\text{NPP}$ of terrestrial ecosystem | $(iii)$ $55$ billion tons |
| $(d)$ Secondary productivity | $(iv)$ Heterotrophs |
- A$(a-i), (b-ii), (c-iii), (d-iv)$
- B$(a-iii), (b-ii), (c-i), (d-iv)$
- C$(a-ii), (b-iii), (c-iv), (d-i)$
- D$(a-iii), (b-i), (c-ii), (d-iv)$
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Given below are two statements:
Statement $I$: The primary source of energy in an ecosystem is solar energy.
Statement $II$: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity $\text{(NPP)}$.
In the light of the above statements,choose the most appropriate answer from the options given below:
Statement $I$: The primary source of energy in an ecosystem is solar energy.
Statement $II$: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity $\text{(NPP)}$.
In the light of the above statements,choose the most appropriate answer from the options given below:
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View SolutionThe annual net primary productivity of the biosphere is approximately
$A$: In secondary productivity,no new organic matter is formed.
$R$: It is only the utilisation of part of food manufactured by primary producers in the building of consumer biomass.
$R$: It is only the utilisation of part of food manufactured by primary producers in the building of consumer biomass.
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View SolutionJustify the following statement in terms of ecosystem dynamics: "Nature tends to increase the gross primary productivity, while man tends to increase the net primary productivity".
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