GPP utilizes ___________ of incident radiation

1. 1 - 5%

2. 2 - 10%

3. 0.8 - 4%

4. 1.6 - 8%

Choose the odd one with respect to trophic level

1 zooplanktons 

2 tadpole

3 grasshopper 

4 phytoplanktons

Which of the following is not correctly matched?

1.  Productivity    -    Rate of biomass production

2.  Gross primary productivity of earth    -    Rate of productivity of organic matter during photosynthesis 

3.  Net primary productivity    -    Available biomass for consumption by heterotrophs

4.  Secondary productivity    -     Formation of new organic matter by producers 

Ecosystem which shows above pyramid of biomass possess ______ and _______ pyramid of number and energy respectively.

1.  Inverted, upright

2.  Upright, upright

3.  Upright, inverted

4.  Spindle, upright

The ecological pyramid of numbers in pond ecosystem is :-

1. Inverted

2. Upright

3. May be upright or inverted

4. First upright then inverted

Standing crop is: 

(i) Amount of detritus in unit area
(ii) Number of living organisms in unit area
(iii) Amount of nutrients such as carbon, nitrogen, and calcium in unit area
(iv) Biomass in unit area

1. (i) and (iv)

2. (i) and (iii)

3. (ii) and (iv)

4. only (iv)

Find the odd one out with respect to functional component of ecosystem

1. Productivity

2. Stratification

3. Decomposition

4. Nutrient cycling

The secondary productivity means

1. Rate of increase in the biomass of autotrophs.

2. Rate of increase in the biomass of heterotrophs.

3. The rate at which the organic molecules are used up by an autotroph.

4. The rate at which inorganic molecules are used up by an autotroph.

How many statements are correct about
decomposition?
(A) Oxygen independent process.
(B) Faster if detritus is rich in lignin and chitin.
(C) Light is the most important climatic factor for decomposition.
(D) Warm and moist environment favour decomposition.

1. One 

2. Two

3.  Three 

4. Four

Mark the odd one with respect to shape of ecological pyramids.

1. Pyramid of energy.

2. Pyramid of number in grassland ecosystem.

3. Pyramid of biomass in aquatic ecosystem.

4. Pyramid of biomass in terrestrial ecosystem.