Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: A network of food chains existing together in an ecosystem is known as a food web. Reason: An animal like kite cannot be a part of a food web.A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but the reason is not the correct explanation of the assertion.
C) If assertion is true statement but reason is false.
D) If both assertion and reason are false.
Correct Answer: C
Solution :
In nature simple food chains occur rarely. The some organisms may operate in the ecosystem at more than one trophic levels, i.e., it may derive its food from more than one source. Even the same organism may be eaten by several organisms of a higher trophic level or an organism may feed upon several different organisms of a lower trophic level. Usually the kind of food changes with the age of the organisms and the food availability. Thus, in a given ecosystem various food chains are linked together and intersect each other to form a complex network called food web. Kite is a carnivorous bird, it eats on fishes, rabbits, snakes, rate and so on. In a food web it occupies a specific position because it controls the population of lower carnivores and herbivores.
You need to login to perform this action.
You will be redirected in
3 sec
