Question

State reasons for each of the following:-
1) Echidna and platypus lay eggs but are considered as mammale
2)Forelimbs of birds are modified.
3)Crocodiles have four chambered heart but are still reptiles.
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Answer 1

Answer:

1) they considered as mammals because they have mammary glands because of the second feed their young ones.

2) this is because of for flight...that we generally referred to as wings.

3) this is because they have dry skin epidermal scales are also present they are cold blooded