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

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?

Differentiate between metaphase and anaphase.

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.