| A: amphibians are the only group of animals without any outer covering on their skin. |
| B: birds are the only group of animals with an outer body covering of feathers. |
| C: fish are the only group of animals with an outer body covering of scales. |
| D: mammals are the only group of animals with an outer body covering of hair and suckle their young. |
A) A and C only
B) B and D only
C) A, C and D only
D) B, C and D only
Correct Answer: B
Solution :
Statements A and C are not true because earthworm and amphibians have moist skin. Fish and snakes have sacles.
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