Differentiate between metaphase and anaphase.

A trait may be inherited but may not be expressed. Explain.

Fixing of the embryo in the wall of uterus is A. Time taken by an embryo for full development in B. Name A and B.

The diagram given below is a representation of K⁺ transport mechanism of stomatal opening and closing. Study the same and answer the questions that follows:

(a) Name the cell labelled as A.

(b) Mention the states of guard cells represented by B and C.

(c) What causes closure of stomata during night?