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Read the following paragraph and identify the correct sequence of terms for the blanks [A], [B], and [C]. "During photosynthesis, the total rate of organic matter production in an ecosystem is called [A] . However, plants use some of this energy for their own metabolism. The remaining biomass, which is [B] , is available for consumption by heterotrophs. When these heterotrophs consume plants and synthesize new organi

Options

  1. A[A] - Net primary productivity, [B] - Gross primary productivity, [C] - Secondary productivity
  2. B[A] - Gross primary productivity, [B] - Secondary productivity, [C] - Net primary productivity
  3. C[A] - Net primary productivity, [B] - Secondary productivity, [C] - Gross primary productivity
  4. D[A] - Gross primary productivity, [B] - Net primary productivity, [C] - Secondary productivity

Correct answer

D. [A] - Gross primary productivity, [B] - Net primary productivity, [C] - Secondary productivity

Step-by-step solution

Gross primary productivity (GPP) is the rate of production of organic matter during photosynthesis. Thus, [A] is Gross primary productivity. Net primary productivity (NPP) is the available biomass for the consumption to heterotrophs (herbivores and decomposers), which remains after plant respiration. Thus, [B] is Net primary productivity. Secondary productivity is defined as the rate of formation of new organic matter by consumers. Thus, [C] is Secondary productivity. Answer: [A] - Gross primary productivity, [B] -

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