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

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

The correct sequence of seral stages in primary hydrarch succession [pioneer to climax] would be:

The amount of nutrients present in the soil, at any given time, is referred to as:
1. Standing state
2. Standing crop
3. Primary productivity
4. Secondary productivity

The reservoir is located in the Earth’s crust for:
I. Gaseous type of nutrient cycle
II. Sedimentary nutrient cycle
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II