List out some common features in cat, rat and bat.

Explanation

Cat, bat and rat belong to the class-Mammalia and have following common features
(i) All have notochord at some stage of their lifecycle.
(ii) All are warm-blooded
All have four-chambered heart.
(iv) All have skin covered with hair and have sweat and oil glands.
(v) Body is divisible into head, neck, trunk and tail.
(vi) Females have milk producing mammary glands.
(vii) Fleshy external ear (pinna) is present.
(viii) Respiration is through lungs only.
(ix) Excrete urea (ureotelic animals)
(x) Fertilisation is internal.