MCQ practice · SSC Biology Board questions · Chapter 13: Environment of Life
Man → mosquito → dengue virus. The food chain above is-
- i. a parasitic food chain
- ii. an incomplete food chain
- iii. a food chain without a producer
Think it through first, then pick an option.
- a i and ii
- b i and iii
- c ii and iii
- d i, ii and iii
Answer and explanation
Correct answer: d i, ii and iii
Man → mosquito → dengue virus is a parasitic chain; the first step is not a green plant, so it is incomplete and without a producer.
Why the other options are wrong
- a i and ii: iii is also true, because the chain has no producer; so all three apply.
- b i and iii: ii is left out; having no producer, the chain is also incomplete.
- c ii and iii: i is left out; the dengue virus depends on the mosquito's body, so it is also a parasitic chain.
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