Zoology · Animal Kingdom

NEET (UG) 2023 — Question 147

The unique mammalian characteristics are:

Answer: A

Option (1) is correct answer because presence of hairs, pinna and mammary glands are unique

features of mammals.

Options (2), (3) and (4) are not correct because, monocondylic skull is present in reptiles and aves

whereas mammals have dicondylic skull. Tympanic membrane is present in amphibians also,

so it is not considered as unique feature. Indirect development is not seen in mammals.

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