| (i) It includes repeated eating i.e., each group eats the other and is subsequently eaten by some other group of organisms. |
| (ii) It shows a series of branching lines and unidirectional flow of energy. |
| (iii) It shows the unidirectional flow of energy and proceeds in a progressive straight line. |
| (iv) It may consists of more than ten trophic levels depending upon the type of ecosystem. |
A) (i) and (ii) only
B) (i) and (iii) only
C) (ii) and (iv) only
D) (i),(iii) and (iv) only
Correct Answer: B
Solution :
A food chain does not show branching lines. It is always straight and proceeds in a progressive straight line. Usually a food chain consists of three or four trophic levels but in few food chains, there may be a maximum of five trophic levels.
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