CBSE Class 9 Answered
Give reasons
for the following :
(a) Echidna
and Platypus lay eggs but are considered as mammals.
(b) Crocodile
has four chambered heart but still is a reptile.
(c) Birds have
pneumatic bones.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) Echidna and platypus lay eggs but are warm blooded and feed their young ones with milk.
(b) Inspite of the four chambered heart, crocodile is cold blooded animal so it is considered as a reptile.
(c) Birds have pneumatic bones which makes their body light for flight.
Answered by | 04 Jun, 2014, 03:23: PM
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