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.

Differentiate between metaphase and anaphase.

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?