Question

write any four important characteristic of class mammalia​

Answer 1

Answer:

The general structure of the mammalian characteristic are:

1. Mammals are endothermic vertebrates
2. Have hair and fur on the body
3. Have mammary glands
4. Four chambered hearts
5. Have sebaceous (fat secreting glands), sudoriferus (sweat), and scent glands.
6. Have heterodont dentation (different types of teeth)
7. Posses diaphragm
8. Posses one single jaw bone
9. Have three small bones in the middle of the ear

Answer 2

• Mammals are warm-blooded animals who give birth to their younger ones.

• They are the most dominant form of animals found in almost all types of habitats.

• They have mammary glands that help them produce milk to feed their younger ones

• Presence of region of the brain known as Neocortex

• Their skin possesses oil glands (sebaceous glands) and sweat glands (sudoriferous glands).

• The fur of hair throughout the body which helps animals adapt to their environment.

• They are heterodont, i.e., possess different types of teeth.

• Mammals also possess cervical vertebrae.

• The skull is dicondylic.The trunk is divided into thorax and abdomen.

• The mammals respire through lungs.

• Good sense of hearing as mammals are aided with 3 middle ear bones

• Mammals have a four-chambered heart. The sinus venous and renal portal system are absent.

• Presence of single-boned lower jaws.

• The brain is well developed divided into cerebrum, cerebellum and medulla.

• They possess 12 pairs of cranial nerves.

• Exhibit one of the most advanced forms of Diaphragms.

• The mammals can lay eggs also. They are known as viviparous.

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