Transport - Jamb Biology Past Questions and Answers

Question 21:

• JAMB 1986

Which is the correct order of water loss from the leaf? 1 Mesophyll 2 Veins 3 Substomatals cavity 4 Stomata

A. 3 → 2 → 1 → 4
B. 2 → 3 → 1 → 4
C. 2 → 1 → 3 → 4
D. 1 → 2 → 3 → 4

Question 22:

• JAMB 1987

The correct sequence of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside is

A. Pith, phloem, cambium, xylem, parenchyma, collenchyma and epidermis
B. Xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis
C. Pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis
D. Phhloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis

Question 23:

• JAMB 1987

Sclerenchyma cells are lignified to

A. Strengthen and support the plant
B. Transport synthesized food
C. Conduct water and salt
D. Protect the plant from injury

Question 24:

• JAMB 1988

In the transverse section of the leaf of maize vascular bundles are arranged in

A. A row
B. One circle
C. Alternate position
D. Two circles

Question 25:

• JAMB 1988

If the phloem of a healthy plant is killed by heat treatment the

A. The upward movement of salt will cease
B. Food manufactured in the leaves will accumulate
C. Whole plant will die immediately
D. Leaves of the plant will become yellow