Jamb 1978 Biology Questions
Question 36:
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:
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:
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:
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:
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