Question

The unique mammalian characteristics are:

• A. hairs, pinna and mammary glands
• B. hairs, pinna and indirect development
• C. pinna, monocondylic skull and mammary glands
• D. hairs, tympanic membrane and mammary glands

Answer 1

The Correct Option is A

These three features are distinguishing characteristics of mammals:

• Hairs: Most mammals have hairs (fur or whiskers), which serve various functions such as insulation, camouflage, and sensory perception.
• Pinna (external ears): Mammals generally have external ears, or pinnae, which help in sound localization and are often well-developed in species with acute hearing.
• Mammary glands: Mammals possess mammary glands, which are responsible for producing milk to nourish their young.

The correct option is (A): hairs, pinna and mammary glands.