adaption : of Earthworm :
1. Stream-lined body:
Adaptation : Earthworm has cylindrical, elongated and segmented body.
Application : 1. To live in burrows, 2. Easy penetration into soil.2. Skin: .
Adaptation : Mucus covers skin, 2. slippery moist skin.
Application : 1. It does not allow soil particle to stick on the skin.
2. Respiration through skin and oxygenation of blood.3. Burrowing:
Adaptation : 1. Circular and longitudinal muscles in body.
2. Each segment of the lower surface of the body has number of bristles called setae.
Application: 1. Movement and subsoil burrowing.
2. To move through the soil and provide anchor in the burrows.4. Aestivation
Adaptation : 1. During dry (or) hot condition, Earthworms moves deep into the soil and become inactive.
2. It secrets mucus and lowers metabolic rate.
Application: To reduce water loss.5. Nocturnality:
Adaptation : Earthworm sense light through light-sensitive cells in the skin.
Remains in burrow during day.
Application : To detect light and changes in light intensity.