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Gross primary productivity is...

Gross primary productivity is

A

Rate at which organic molecules are formed in autotrophs

B

Rate at which organic molecules are used up by autotrophs

C

Storage of organic molecules in the body of autotrophs

D

Rate at which organic molecules are transferred to next higher trophic level

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The correct Answer is:
A
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Assertion : The plant biomass which serves as the food of herbivores and decomposers is said to result from the gross primary productivity. Reason : Gross primary productivity is the rate of net production of organic meterial (biomass).

Which of the following statements are true ? 1. Gross primary productivity is always greater than Net Primary productivity . 2. Gross primary productivity plus the respiration losses give us Net Primary productivity . 3. The rate of respiration of plants affects the Net Primary productivity . 4. Net primary productivity + Gross primary productivity = Respiratory loss.

Select the correct combination of statements regarding the characteristics of productivity : I. The rate of biomass production is called productivity and is expressed in terms of kcal m^(-2) II. Gross primary productivity is rate of production of biomass during photosynthesis IIl. Gross primary productivity minus respiration loss is called net primary productivity IV. Primary productivity depends only on the plant species inhabiting a particular area. The correct statements are

Gross primary productivity minus respiration losses of an ecosystem is

In relation to Gross primary productivity and Net primary productivity of an ecosystem,which one of the following statements is correct?

The biomass available for consumption to heterotrophs and the rate formation of new organic matter by consumers are defined as (a) gross primary productivity and net primary productivity respectively (b) net primary productivity and gross primary productivity respectively (c) gross primary productivity and secondary productivity respectively (d) net primary productivity and secondary productivity respectively.

Describe the onter - relationship between productivity , gross primary productivity and net productivity.

Describe the inter - relationship between productivity , gross primary productivity and net productivity.

Describe the interrelationship between productivity , gross primary productivity and net productivity.

Write the relationship between productivity, gross primary productivity, net primary productivity, net primary productivity and secondary productivity.

AAKASH SERIES-ECOSYSTEM-EXERCISE-I (PRODUCTIVITY)
  1. Gross primary productivity minus respiration losses of an ecosystem is

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  2. The available biomass for the consumption to heterotrophs is called

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  3. Gross primary productivity is

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  4. is the rate of production of organic matter by consumers.

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  5. The biomass available for consumption by the herbivores and the decomp...

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  6. Productivity is the rate of production of biomass expressed in terms o...

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  7. The energy storage at producer level which can be consumed by herbivor...

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  8. A certain mass of living material at a particular time in each trophic...

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  9. The NPP in a plant is 100kj. What is the body mass of the secondary ca...

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  10. Which of the following is expected to have the highest value (gm//m^(2...

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  11. Which of the following statements about decomposition is incorrect?

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  12. Most important climatic factors that regulate the rate of decompositio...

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  13. The raw material for decomposition, the detritus includes

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  14. Various steps in decomposition are

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  15. Breakdown of detritus into smaller particles by earthworm is a process...

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  16. The process by which water soluble inorganis nutrients go down into th...

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  17. Degradation of detritus into simple inorganic substances by the enzyma...

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  18. Decomposition is largely

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  19. The rate of decompostion is controlled by

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  20. Decomposition is largely

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