Secondary succession takes place on/in

• bara rock

• degraded forest

• newly created pond

• newly created pond

Of the total incident solar radiation, the proportion of PAR is 

• about 60%

• less than 50%

• more than 80%

• more than 80%

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

• It shows energy content of different trophic level organisms

• It is inverted in shape

• It is upright in shape

• It is upright in shape

Vertical distribution of different species occupying different levels in a biotic community is known as

• divergence

• stratification

• zonation

• zonation

Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?

• Sparrow

• Lion

• Goat

• Goat

If 20 J of energy is trapped at the producer level, then how much energy will be available to peacock as food in the following chain?

Plant--> Mice --> Snake --> Peacock

• 0.02 J

• 0.002 J 

• 0.2 J 

• 0.2 J 

Identify the likely organisms (a), (b) (c) and (d) in the food web shown below

• (I)	(II)	(III)	(IV)
  deer	rabbit	frog	rat

• (I)	(II)	(III)	(IV)
  dog	squirrel	bat	deer

• (I)	(II)	(III)	(IV)
  rat	dog	tortoise	crow

• (I)	(II)	(III)	(IV)
  rat	dog	tortoise	crow

The mass of living material at a tropic level at a particular time is called

• gross primary productivity 

• standing state

• net primary productivity

• net primary productivity

Which one of the following statements is correct for secondary succession?

• It occurs on a deforested site

• It follows primary succession

• It is similar to primary succession except that it has a relatively fast pace

• It is similar to primary succession except that it has a relatively fast pace

In an ecosystem the rate of production of organic matter during photosynthesis is termed as

• net primary productivity

• gross primary productivity 

• secondary productivity

• secondary productivity