Trophic Levels : The various steps in the food chain at which the transfer of food (or energy) takes place is called trophic levels. There is a gradual decrease in the amount of energy transfer from one trophic level to the next trophic level in a food chain. Only 10% of energy is transferred to next trophic level while 90% of energy is used by present trophic level in its life processes.
1. The _______ constitute the first trophic level.
a. plant
b. primary consumers
c. carnivores
d. tertiary consumers
2. The _________ form the second trophic level.
a. plant
b. primary consumers
c. carnivores
d. tertiary consumers
3. The ________ make up the third trophic level.
a. plant
b. primary consumers
c. carnivores
d. tertiary consumers
4. The _______ constitute the fourth trophic level.
a. plant
b. primary consumers
c. carnivores
d. tertiary consumers
5. Human is a ______ consumer.
a. top
b. bottom
c. middle level
d. None
