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
Ecosystem which shows above pyramid of biomass possess ______ and _______ pyramid of number and energy respectively.
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
For which of the following predatory food chain pyramid of biomass is inverted?
1. Grass Insect Snake Frog
2. Detritus Sparrow Earthworms
3. Phytoplanktons Zooplanktons Fish
4. Tree Birds Parasite
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?
Detritivores, Scavengers, Decomposers, Producers, Insectivorous plant |
1. 2
2. 3
3. 4
4. 1
GPP utilizes ___________ of incident radiation
1. 1 - 5%
2. 2 - 10%
3. 0.8 - 4%
4. 1.6 - 8%