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

	A	B	C
1.	T	T	F
2.	F	T	F
3.	F	F	T
4.	T	F	F

In grassland ecosystem the pyramid of biomass and energy will be     A     and    B    respectively.

Choose the correct option to fill the blanks A and B.

         A          B

1. Upright  Upright

2. Upright  Inverted

3. Inverted Upright

4. Inverted Inverted

The rate of decomposition of detritus is slow when

1. It contains lignin, chitin, tannins and cellulose

2. Temperature is more than 25°C

3. It contains proteins

4. There is good aeration

How many of these have no place in ecological pyramids?

1. 2

2. 3

3. 4

4. 1

For which of the following predatory food chain pyramid of biomass is inverted?

1. Grass $\to$ Insect $\to$ Snake $\to$ Frog

2. Detritus $\to$ Sparrow $\to$ Earthworms

3. Phytoplanktons $\to$ Zooplanktons $\to$ Fish

4. Tree $\to$ Birds $\to$ Parasite

Standing crop is: 

(i) Amount of detritus in unit area
(ii) Number of living organisms in unit area
(iii) Amount of nutrients such as carbon, nitrogen, and calcium in unit area
(iv) Biomass in unit area

1. (i) and (iv)

2. (i) and (iii)

3. (ii) and (iv)

4. only (iv)

The ecological pyramid of numbers in pond ecosystem is :-

1. Inverted

2. Upright

3. May be upright or inverted

4. First upright then inverted

The given diagram represents a pyramid of biomass in a particular ecosystem, where the biomass of primary consumers (PC) is greater than that of primary producers (PP).
Based on this, identify the correct nature of the pyramid of number and pyramid of energy in the same ecosystem.

1.  Inverted, upright

2.  Upright, upright

3.  Upright, inverted

4.  Spindle, upright

Which of the following is not correctly matched?

1.  Productivity    -    Rate of biomass production

2.  Gross primary productivity of earth    -    Rate of productivity of organic matter during photosynthesis 

3.  Net primary productivity    -    Available biomass for consumption by heterotrophs

4.  Secondary productivity    -     Formation of new organic matter by producers 

GPP utilizes ___________ of incident radiation

1. 1 - 5%

2. 2 - 10%

3. 0.8 - 4%

4. 1.6 - 8%