Which of the following is the functional unit of nature?

1. A plant

2. An animal

3. Ecosystem

4. Environment

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 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

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

1. Productivity

2. Stratification

3. Decomposition

4. Nutrient cycling

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 is not a man-made ecosystem?

1. Pond

2. Crop-field

3. Swimming pool

4. Both ‘1’ and ‘3’

Identify the odd one out?

1. Forest

2. Grassland

3. Desert

4. Wetland

Read the given statements stating true (T) and false (F) and select the correct option.

A. Anthropogenic ecosystem possess self regulatory mechanism

B. Forest is a natural ecosystem

C. Estuaries is a terrestrial ecosystem