Question 301:

• JAMB 1983

Herbs differ from shrubs because they

A. Do not produce fruit
B. Are useful to herbalist
C. Do not become woody
D. Are only annual
E. Are only perennials

Question 302:

• JAMB 1983

If an organic compound has its hydrogen: oxygen ratio as 2:1, it is likely to be

A. A protein
B. A cabohydrate
C. A fat
D. A fatty acid and glycerol
E. An amino acid

Question 303:

• JAMB 1983

Which of the following elements are necessary for the formation of chlorophyll in a plant?

A. Magnesium and iron
B. Calcium and potassium
C. Calcium and sulphur
D. Potasium and sulphur
E. Phosphorus and potassium

Question 304:

• JAMB 1983

Which of the following statements is NOT true of mammalian erythrocytes?

A. They have haemoglobin
B. They appear yellow when looked at singly
C. They are disc shaped
D. The cell are more numerous than leucocytes
E. They have nuclei at maturity

Question 305:

• JAMB 1983

In woody plants, grass and water vapour are transported across the stems by the

A. Xylem fibres
B. Medullary rays
C. Sieve tubes
D. Phloem fibres
E. Phloem parenchyma