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

known as 

1. divergence

2. stratification

3. zonation

4. pyramid

Which one of the following is not a functional unit of an ecosystem?

1. Energy flow                 

2. Decomposition

3. Productivity                 

4. Stratification

Which one of the following is one of the characteristics of a biological community ?

1. Stratification 

2. Natality 

3. Mortality 

4. Sex-ratio

Which vertical strata is occupied by trees in a forest?

1. Top

2. Middle

3. Bottom

4. Any of the above.

Which of the following could affect the rate of function of a pond?

1. The solar input

2. The cycle of temperature

3. Day-length

4. All of the above

The basic requirement for any ecosystem to function and sustain is

1. Enormous amount of water

2. Constant input of solar energy

3. Fertile soil

4. Oxygen

The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called as-

1. Biomass production

2. Primary production

3. Secondary production

4. Assimilation

Find the odd one out with respect to functional component of ecosystem

1. Productivity

2. Stratification

3. Decomposition

4. Nutrient cycling

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