Assertion : Insects develop a complex system of air tubes called trachea for respiratory purpose.
Reason : Exchange through body surface is not possible in insects.

Assertion Insects have a complex system of air tubes called trachea for respiratory puropose . Insects do not respire through body surface.

In insects, respiratory gas exchange occurs through

In insects, respiratory gas exchange occurs through

In insects, respiratory gas exchange occurs through

In insects, respiratory gas exchange occurs through

Assertion : - Blood in cockroach is colourless with no respiratory pigment. Reason : - Gasesous exchange occurs through diffusion in haemolymph.

Assertion: Water vascular system of echinoderms helps in locomotion, capture and tranport of food and respiration.. Reason: Echinoderms are spiny bodies animals in which development is indirect with free-swmming larva.

Assertion : Lymph is a colourless fluid containing specialised lymphocytes which are responsible for the immune responses of the body. Reason : Exchange of nutrients, gases etc., between the blood and the cells always occur through this fluid.

Assertion : Lymph is a colourless fluid containing specialised lymphocytes which are responsible for the immune responses of the body. Reason : Exchange of nutrients, gases etc., between the blood and the cells always occur through this fluid.