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Subject :NSO    Class : Class 6

On the basis of body covering, Rohit made four groups of three organisms each. In an attempt of doing so, he classified organisms incorrectly in one of the groups. Identify this group and select the correct option.

ATortoise, Snail, Oyster
BFish, Snake, Lizard
CPenguin, Ostrich, Bat
DHippopotamus, Whale, Cow

why c is answer

Ans 1:

Class : Class 7
Hippo, whale and cow have skin covering.

Ans 2:

Class : Class 8
Penguin and ostrich are birds(aves) while a bat is a mammal. Thus, a bat has hair on its skin. An ostrich has feathers on its skin. A penguin has very little or no feather on it so as to make itself streamlined to be able to swim easily.

Ans 3:

Class : Class 7

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