1. Human heart is an autonomous pump organ which circulate blood by cardiac cycle. Lung is a unique chamber of that blood purification.
3. In some crosses between to white flower sweet pea plants has found purple flowered plants. Although the cross in normal parents have also colourblind child.
4. Hydra is a diploblastic microscopic fresh water specimen. the gastrodermis of Hydra enclosed a central cavity in its body called gastrovascular cavity.
5. Our body covered with skin. It roles play in immunity as a physical barrier as well as lymphocytes take part in immunity by secretion.