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NTA Abhyas NEET2020BotanyEcosystemPractice

Select the correct statement about productivity from the following.

Options

  1. AGross primary productivity is the available biomass for the consumption to heterotrophs.
  2. BSecondary productivity depends on the photosynthetic capacity of the plant species inhabiting a particular are
  3. CProductivity is expressed in terms of kg –2 yr –1 or (kcal m –2 )yr –1 to compare the productivity of differen
  4. DOf an approximate NPP of 170 billion tonnes, the productivity of the oceans are only 55 billion tons despite a

Correct answer

D. Of an approximate NPP of 170 billion tonnes, the productivity of the oceans are only 55 billion tons despite a

Step-by-step solution

The rate of biomass production is called productivity. It is expressed in terms of g –2 yr –1 or (kcal m –2 )yr –1 to compare the productivity of different ecosystems. It can be divided into gross primary productivity (GPP) and net primary productivity (NPP). Net primary productivity is the available biomass for the consumption to heterotrophs (herbiviores and decomposers). Primary productivity depends on the plant species inhabiting a particular area. It also depends on a variety of environmental factors, availabi

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