How do auxins help in bending of the stem towards light? Explain.

Electrical impulses are an excellent means of quick transfer of information in animals but there are limitations to the use of electrical impulses. List such two limitations.

Electrical impulses are an excellent means of quick transfer of information in animals but there are limitations to the use of electrical impulses. State the other means of communication used by most multicellular organisms between the cells.

Name the part of the brain which controls-

(i) Voluntary action

(ii) Involuntary action.