Question
Biology Question on Kingdom Animalia
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
hairs, pinna and mammary glands
Explanation
Solution
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.