Identify the correct statements: 

I:	Only a few individuals can be taken into account at any trophic level and the deductions may be generalised.
II:	Trophic level is a functional level and does not represent a species.
III:	A given species may occupy more than one trophic level in the same ecosystem at the same time.

 

1.	Only I and II	2.	Only I and III
3.	Only II and III	4.	I, II, III and IV

The pyramid of biomass in the sea is generally inverted because:

Which of the following pyramids can never be inverted in any ecosystem?
1. Pyramid of numbers
2. Pyramid of biomass
3. Pyramid of energy
4. All ecological pyramids can be inverted

In an ecological pyramid, the saprotrophs:
1. are primary producers
2. can be at any trophic level
3. are not given any place
4. are kept with apex predators

Ecological succession is:
1. gradual and predictable
2. gradual and unpredictable
3. sudden and predictable
4. sudden and unpredictable

The entire sequence of communities that successively change in a given area are called:
1. Taxa
2. Seres
3. Pioneers
4. Climax

Ecological succession has paralleled:
1. Glaciations
2. Mass extinctions
3. Genetic drifts
4. Evolution

In which of the following instances would an ecological succession regarded as secondary?
1. Newly cooled lava
2. Bare rock
3. Newly created pond
4. Abandoned farmland

Identify the correct statements regarding ecological succession:

1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III

Ecological succession leads to mesic conditions in: 

1. Both I and II
2. Only I
3. Only II
4. Neither I nor II