Question

give any two features of class mammalia

Answer 1

Following are the features of $\textbf{Mammalia }$:

1. They have exoskeleton of hair.

For example, human, rat etc.

2. They have external ears.

For example, human etc.

3. Most of them give birth to live youngs.

Except, platypus and echidra.

Answer 2

✌️✌️hey mate,

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➡️General features of Mammalia:

• The most unique mammalian characteristic is the presence of milk producing glands (mammary glands) by which the young ones are nourished.
• They are found in variety of habitats - polars ice caps, desserts, mountains, forests, grasslands and dark caves.
• They have two pairs of limbs, adapted for walking, running, climbing, burrowing, swimming or flying.
• The skin of mammals is unique in possessing hair.
• External ear or pinnae are present.
• Different types of teeth are present in the jaw.
• Heart is four chambered.
• They are homeothermous.
• Respiration is by lungs.
• Sexes are separate and fertilization is internal.
• Development is direct.
• The neck generally has seven cervical vertebrae.
They are Viviparous with few exceptions.

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thanks.....