Plant vascular system - Jamb Biology Past Questions and Answers

Question 11:

• 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 12:

• 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 13:

• 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 14:

• JAMB 1994

The phloem parenchyma is sometimes used for

A. Food storage
B. Supporting the stem
C. Production of the sieve tube
D. Transporting water

Question 15:

• JAMB 1996

the function of lenticels is

A. To remove excess water in plant
B. To absorb water from the atmosphere
C. For gaseous exchange
D. To absorb light
E. To store food