The part labelled III is the

A. albumen

B. chalaza

C. yolk

D. air space

Which of the following statements ls true about transpiration? It is the

A. loss of water in the form of vapour from the surface of the’ leaf

B. loss of water in the form of vapour from the surface of the root

C. absorption of water in the form of vapour from the body of the pint

D. movement of water through the body of the plant.

Transportation of water in the xylem tissue involves the following except

A. root pressure

B. capillary action

C. transpiration pull

D. translocation

The following are the major reasons why the butterfly lays eggs under the surface of a leaf except to

A. shade the eggs from the direct rays of the sun.

B. protect the eggs from predators

C. protect the eggs from being washed away by rain drops

D. camouflage the eggs

In which of the following organic compounds is the hydrogen-oxygen ratio equal to 2:1?

A. Proteins

B. Carbohydrates

C. Lipids

D. Vitamins

A man suffering from obesity must avoid meals containing

A. margarine and butter

B. rice and beans

C. carrots and oranges

D. beef and fish

In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the

A. cell walls are hardened

B. cells are killed

C. chlorophyll is dissolved out

D. iodine will penetrate

Which of the following food substances is incorrectly linked to its enzyme?

A. Protein - trypsin

B. Fat - lipase

C. Sucrose - pepsin

D. Starch - amylase

Which of the following pH values is the best for the action of the enzymes - renin and pepsin in the
stomach?

A. pH2

B. pH7

C. pH8

D. pH9

The bacterium in a mutualistic association with legumes converts

A. nitrates to ammonia

B. ammonium compounds to nitrites

C. nitrogen gas to ammonia

D. nitrites to nitrates