Transport - Biology Jamb Past Questions and Answers

Question 16 :

• JAMB 1980

If the bark and phloem tissue of a woody shoot are peeled off by ringing, the whole plant will die eventually die because?

A. Water does not reach the leaves
B. Water and salts remained below the ring portion
C. There is a withdrawal of water from the root by soil
D. Manufactured food does not reach the roots
E. The roots store too much water

Question 17 :

• JAMB 1981

The rate of transpiration of a leafy shoot would be highest under

A. Damp, cold, still air
B. Damp, warm, moving air
C. Dry, warm, moving air
D. Dry, cold, moving air
E. Dry, warm, still air

Question 18 :

• 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

Question 19 :

• JAMB 1985

In an angiosperm leaf, the xylem is

A. Beside the phloem
B. Surrounded by trhe phloem
C. Above the phloem
D. Around the phloem
E. In separate bundles from the phloem

Question 20 :

• JAMB 1986

The stem differs from the root in having the xylem and phloem strands

A. On the same radii
B. Scattered
C. On alternate radii
D. Towards the pith