Transport - Jamb Biology Past Questions and Answers

Question 6:

• JAMB 1978

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

Question 7:

• JAMB 1978

A potometer with a leafy shoot weighed 18.9g initially and weighed 17.9g after one hour. From this it follow that

A. The shoot absorbed 1g of water per hour
B. 1g of water per hour evaporates from the potometer
C. The shoot lost 1g of water per hour
D. The potometer water receded at the rate of 1g per hour
E. The shoot was respiring and lost weight at rate of 1g per hour

Question 8:

• JAMB 1978

a potometer was used to compare the rate of loss of the same volume of water from a plant under different environmental conditions as under a fan, at the sea shore, under the sun, in the airy laboratory and in cupboard. What time was likely to have been obtained in a cupboard?

A. 15 secs
B. 30secs
C. 25secs
D. 20secs
E. 28secs

Question 9:

• JAMB 1978

The number shown as 8 refers to

A. Upper epidermise
B. Cuticle
C. Stoma
D. Guard cell
E. Lower epidermis

Question 10:

• JAMB 1979

Which of these tissue serves the function of support and water conduction

A. Parenchyma
B. Collenchymas
C. Sclerenchyma
D. Xylem
E. Phloem