Question

characteristics of mammalia

Answer 1

they have a vertebrate
they give birth to young ones
they have mammary glands to nourish their young
they have hairs all over their body

Answer 2

hey mate here is the answer....
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1) Body is divided into head, neck, trunk and tail.
2) Exoskeleton in the form of hair, fur, nails, hooves, etc.
3)skin glandular with sweat and sebaceous glands.
4) Mammary glands present, external ear present.
5) warm blooded.
6) body cavity divided into 2 parts - thoracic and abdominal cavity separated by a diaphragm.
7) Viviparous and parental care is seen.
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thanks...
nice to help you