Total amount of energy trapped by green plants in food is called:
1. Gross primary production
2. Net primary production
3. Standing crop
4. Standing state
Which of the following is expected to have the highest value (gm/ /yr) in a grassland ecosystem:
1. Tertiary production
2. Gross production (GP)
3. Net production (NP)
4. Secondary production
Percentage of energy transferred to the higher tropic level in a food chain is:
1. 1%
2. 10%
3. 90%
4. 100%
Which is the reason for the highest biomass in an aquatic ecosystem:
1. Nano plankton, blue-green algae, green algae
2. Seagrass, and slime molds
3. Benthonic and brown algae
4. Diatoms
If a bamboo plant is growing in a far forest then what will its trophic level be:
1. First trophic level (T1)
2. Second trophic level (T2)
3. Third trophic level (T3)
4. Fourth trophic level (T4)
In the equation GPP – R = NPP, R represents:
1. Environment factor
2. Respiration losses
3. Radiant energy
4. Retardation factor
Which of the following statements is not correct?
1. | Pyramid of energy is always upright. |
2. | Pyramid of numbers in a grassland ecosystem is upright. |
3. | Pyramid of biomass in sea is generally inverted. |
4. | Pyramid of biomass in sea is generally upright. |
The breakdown of detritus into smaller particles by earthworm is a process called:
1. Catabolism
2. Humification
3. Fragmentation
4. Mineralisation
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?
1. Frog
2. Sparrow
3. Lion
4. Goat
The rate of decomposition is faster in the ecosystem due to the following factors, except:
1. | Detritus rich in sugars |
2. | Warm and moist environment |
3. | Presence of aerobic soil microbes |
4. | Detritus richer in lignin and chitin |