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Question 21
Can you give me a name? Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.

(a)  I am tall but I cannot move. I am green and can prepare my own food. tree, autotroph
(b)  I live in water; people keep me in an aquarium and feed me. __, __
(c)  I am small and I can fly. I disturb your sleep, bite you and suck your blood which is my food. __, __
(d)  I am white and soft. I grow well in the rainy season. Children pluck me from the ground and admire me. I absorb nutrients from decomposed dead parts of plants and animals in the soil. __, __


Solution

(b)  fish, heterotroph The heterotrophs are organisms that take in ready-made food prepared by the plants. Some other examples are cow, tiger, rabbit, lion etc.

(c) mosquito, parasiteThe organisms that derive nutrition from the body of other living organisms (host) are called parasites. Some other examples are cuscuta, leech, bed bug etc.

(d) mushroom, saprophyteThe plants which derive nutrition from dead and decaying organisms are called saprotrophs or saprophytes. Some other examples are bread moulds, earthworm etc.


Biology
NCERT Exemplar
Standard VII

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