Ecosystem

The upright pyramid of number is absent in

• Pond

• Forest

• Lake

• Grassland

Secondary productivity is rate of formation of new organic matter by

• Producer

• Parasite

• Consumer

• Decomposer

Which one of the following is not a functional unit of an ecosystem?

• Energy flow

• Decomposition

• Productivity

• Stratification

The biomass available for consumption by the herbivores and the decomposers is called

• Net primary productivity

• Secondary productivity

• Standing crop

• Gross primary productivity

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-4

Which one of the following statement for pyramid of energy is incorrect whereas the remaining three are correct?

• It show energy content of different trophic level of organisms.

• It is inverted in shape.

• It is upright in shape.

• Its base is broad.

Identify the possible link 'B' in the following food chain:
Plant  $\longrightarrow$  Insect  $\rightarrow$   'B'  $\rightarrow$     Eagle

• Lion

• Frog

• Peacock

• Human

Natural reservoir of phophorus is

• Rock

• Fossils

• Sea water

• Animal bones

Of the total incident solar radiation the proportion of PAR is

• about 70%

• about 50%

• about 60%

• about 80%

Which one of the following pair is mismatached?

• Biomass burning - Release of CO₂

• Fossil fuel burning - Release of CO₂

• Nuclear power - Radioactive waste

• Solar energy - Green house effect

Which one of the following is not used for constructing of ecological pyramids?

• Dry weight

• Number of individuals

• Rate of energy flow

• Fresh weight