At the trophic level of consumers, the rate at which food energy is assimilated, is called:

1. Secondary productivity

2. Gross primary productivity

3. Net primary productivity

4. None of these

Net primary productivity is the gross primary productivity minus

1. that which is consumed by herbivores

2. that which is consumed by producer in metabolism

3. secondary productivity 

4. loss due to mortality

Consider the following two statements:

1. Both l and ll are correct and ll explains l

2. Both l and ll are correct but ll does not explain l

3. l is correct but ll is incorrect

4. l is incorrect but ll is correct

The rate of formation of new organic matter by consumers is called as:

1. Secondary productivity
2. Standing crop
3. Standing state
4. Net primary productivity

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

1. Gross primary productivity

2. Standing state

3. Net primary productivity

4. standing crop