Jamb Biology 1978 Past Questions and Answers

Question 36:

• JAMB 1978

In a photo-tropic experiment, young seedlings in a box were subjected to light from one direction. The seedling continue to grow erect. Which of the following statement is correct

A. Only the tip of the seedling received the light
B. The light was not strong enough
C. The seedlings were rather too young
D. The tip of the seedling may have been covered
E. The box containing the seedling should have been placed on a laboratory bench

Question 37:

• JAMB 1978

Which of these is not a characteristics of a wind pollinated flowers?

A. A smaller quantities of sticky pollen produce
B. Feathery styles of stigmas pendulously hang outrside the flower
C. Small inconspicuous scentless flower
D. Large anthers which are loosley attached to the filament
E. Light pollen grains produced in large quantities from the anthers

Question 38:

• JAMB 1978

A germinating seed requires oxygen which is essential for

A. Converting carbonhydrate into glucose
B. Transporting energy from part of the plant to another
C. The production of energy by oxidising essential carbonhydrate
D. Hydrolysis of protein
E. The formation of water molecules within the germinating seed

Question 39:

• JAMB 1978

Which of these products obtained from analyzing sweat from skin is not an excretory product?

A. Water
B. Salts
C. Dust
D. Urea
E. Urates

Question 40:

• JAMB 1978

In a breeding program a cross was made between two true breeding cow-pea types: one with round seeds and the other with wrinkled seed. If roundness is dominant why wrinkleness is recessive, in the first filial generation all the seeds produced will be

A. 25% wrinkled, 75% round
B. 100% wrinkled
C. 50% wrinkled, 50% round
D. 75% wrinkled, 25% round
E. 100% round