Q. 805.0( 2 Votes )

An organism X having breathing organs A lives on land. When organism X goes under water, it cannot survive for a long time unless carrying an oxygen cylinder. On the other hand, the organism Y having breathing organs B always lives in water and if taken out of water; it dies after a short while. A third organism Z having. breathing organs C and D which lives on the banks of ponds, lakes and rivers can survive on land as well as in water equally well.

(a) What could organism X be ? Name the breathing organs A.

(b) What could organism Y be ? Name the breathing organs B.

(c) What could organism Z be? Name the breathing organs C and D.

(d) Out of X, Y and Z, which organism is (i) amphibian, (ii) aquatic, and (iii) terrestrial ?

Answer :

(a) Organism X could be man. Man (X) have the lungs (A) as breathing organ.

(b) Organism Y could be Fish. Fish has the gills (B) as breathing organ.

(c) Organism Z could be frog. Frog has lungs (C) and skin (D) as breathing organs.

(d) (i) Organism Z (ii) Organism Y (iii) Organism X

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