'It is possible that a species may occupy more than one trophic level in the same ecosystem time'.Explain with the help of an example.

2

(a)

Explain with the help of two examples,how the pyramid of number and the pyramid of biomass can look inverted.

2

(a)

Distinguish between grazing food chain and detritus food chain.

2

(a)

Distinguish between upright and inverted pyramids.

2

(a)

Mention the factors on which the nature/type of pioneer species of a secondary succession depend.

2

(a)

What are the two important points one must realise regarding succession?

2

(a)

How do you distinguish between humification and mineralisation?

2

(a)

The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of soil substratum, temperature, etc. Discuss.

2

(a)

List the important differences between producers and decomposers.

2

(a)

How does succession differ in terrestrial and aquatic system? Give salient points.

2

(a)

Give the 3 types of pyramids of numbers.

2

(a)

How pioneer species in primary succession on bare rock help in the formation of soil during the early stages of succession?

2

(a)

(a) All the tigers at Sariska reserved forest have died . What will be the long term effect of this on the population of deer in that forest.
(b) Now three tigers have been brought there from outside. What difference will it make?

2

(a)

Name the first trophic level of a detritus food chain. How is it different from first trophic level of GFC?

2

(a)