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प्रश्न
Write down four characters of mammals. Give two examples.
उत्तर
Characteristics of mammals:
(i) Their body is divisible into head, trunk, neck and tail. Cutaneous glands such as sweat glands, scent glands and sebaceous glands are present.
(ii) Females have mammary glands which secrete milk for the nourishment of the young.
(iii) A muscular diaphragm separates thoracic and abdominal cavities and respiration takes place through lungs only.
(iv) Two pairs of pentadactyl limbs are present. Teeth are thecodont and heterodont.
Example: Macropus and Rattus, Macaca.
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संबंधित प्रश्न
Match the following:
| Column I | Column II | ||
| (a) | Operculum | (i) | Ctenophora |
| (b) | Parapodia | (ii) | Mollusca |
| (c) | Scales | (iii) | Porifera |
| (d) | Comb plates | (iv) | Reptilia |
| (e) | Radula | (v) | Annelida |
| (f) | Hairs | (vi) | Cyclostomata and Chondrichthyes |
| (g) | Choanocytes | (vii) | Mammalia |
| (h) | Gill slits | (viii) | Osteichthyes |
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