alleryWhich feature is the typical, defining character of class Mammalia?
APresence of mammary glands
BForelimbs modified into wings
CJaws modified into a beak
DSkin that is dry and scaly
Answer & Solution
Correct answer: A. Presence of mammary glands
1. Each class has a signature feature.
2. The typical character of Mammalia is the presence of mammary glands.
3. Rule out wings: forelimbs modified into wings mark birds (Aves).
4. A beak and dry scaly skin point to Aves and Reptilia respectively.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 6 "Animal Classification", p.83_
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