In humans, the life processes are controlled and regulated by

Which of the following endocrine glands is unpaired?

Junction between two neurons is called

Label the parts (a), (b), (c) and (d) and show the direction of flow of electrical signals in Figure 7.2.

Name the plant hormones responsible for the following:

(a) Elongation of cells

(b) Growth of stem

(c) Promotion of cell division

(d) Falling of senescent leaves