Concept of Trophic Levels
Trending Questions
Q. Assertion [A]: Trophic level represents a functional level, not a species as such.
Reason [R]: A given species may occupy more than one trophic level in the same ecosystem at the same time.
Reason [R]: A given species may occupy more than one trophic level in the same ecosystem at the same time.
- Both statements A and R are correct and statement R is the correct explanation of statement A.
- Both statements A and R are correct and statement R is not the explanation of statement A.
- Statement A is correct and statement R is incorrect.
- Both statements A and R are incorrect.
Q.
Mr X is eating curd/yoghurt. For this food intake in a food chain, which of the following trophic level will he occupy?
- Third trophic level
- First trophic level
- Fourth trophic level
- Second trophic level
Q. Which of the following is the trophic level of an orchid growing on a mango tree?
- First
- Tertiary/ Third
- Second
- Fourth
Q.
What is the first trophic level in a lake ecosystem?
Phytoplankton
Benthos
Plankton
Zooplankton
Q.
How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?
1%
10%
40%
90%
Q. With respect to the given image, who is/are the tertiary consumers in this ecosystem?


- Crab, dogfish, dogwhelk
- Barnacle, crab, dogfish
- Crab, dogfish, periwinkle
- Barnacle, crab, periwinkle
Q.
Nepenthes belongs to the category of
primary consumer
producer
secondary consumer
both b and c
Q.
How many organisms in the given list are omnivores?
Rabbit, Sparrow, Hydra, Crow, Man, Fox, Cockroach, Bobcat
Five
Four
Three
Six
Q.
The dominant second trophic level in a lake ecosystem consists of
- The biotic components are almost similar
- The abiotic components are almost similar
- Primary and secondary consumers are similar
- Both biotic and abiotic components are different
Q.
What is true of a ecosystem?
Inverted
Remains unchanged
vertical
Variable