Explain why generally only the male child suffers from colour blindness and not the female?

Name two types of passive transport.

The given figure shows a cell. Study the figure and answer the questions that follows.

(a) Identify the stage of cell cycle depicted by the cell.

(b) Write any two characteristic of this phase.

(c) Identify A and B.

Which gland secretes thyroxine? What will happen if the secretion of thyroxine is insufficient?