Expand the abbreviation ABA.

Give two differences between ethylene and abscisic acid.

Comment briefly on the structure and composition of blood.

Given below is the diagram of an apparatus set up to study a very important physiological process. Study the diagram and answer the questions that follow.

(a) Name the process being studied.

(b) What change would you observe in the thistle funnel containing sugar solution after about 10 minutes?

(c) Name the part of the plant cell which is represented by the sugar solution.