Assertion : In mammals, complex respiratory system has developed.
Reason : Mammalian skin is impermeable to gases.

In cockroach well developed respiratory system is seen

Skin has no respiratory role in

Assertion : Products of digestion are absorbed in the small intestine. Reason : Large intestine has impermeable wall.

Assertion : Products of digestion are absorbed in the small intestine. Reason : Large intestine has impermeable wall.

Assertion :- Mostly mammals are viviparous. Reason :- Mammals having milk producing glands.

Assertion :- Products of digestion are absorbed in the small intestine. Reason:- Large intestine has impermeable wall.

Assertion : Plants have no specialised respiratory organs. Reason : There is very little transport of gases from one plant part to another.

Assertion : Plants have no specialised respiratory organs. Reason : There is very little transport of gases from one plant part to another.

Assertion : Plants have no specialised respiratory organs. Reason : There is very little transport of gases from one plant part to another.

Assertion : In mammals the female secondary sexual characters are developed by gonadotropins. Reason : Gonadotropins are secreted by graafian follicle.