Reproduction - Jamb Biology Past Questions and Answers

Question 6:

• JAMB 1978

The following events take place during conjugation in spirogyra 1. The protoplasm of each of the conjugating cell separate from the cell wall to form a Gamete; the gamete of one filament passes through the conjugation tube to meet the gamete of the other filament 2. The zygote soon become surrounded by thick brown wall to become zygospore which burst after a short rest and germinate to produce a new filament 3. The nuclei of the gametes fuse to form a zygote 4. The protuberance meet and where they touch the cell-wall disappear so that a conjugation tube joining the two cell is formed 5. protuberance appear on the wall of the cell of two filament of spirogyra lying side by side opposite one another. Now what is the correct sequence in which the above sequence occur?

A. 1,2,3,4,5
B. 1,2,4,5,3
C. 3,4,5,2,1
D. 5,4,1,3,2
E. 5,4,3,1,2

Question 7:

• JAMB 1978

In which of the following groups of organisms do all the members have asexual method of reproduction?

A. A geen filament algae, a flowering plant and a bird
B. A toad (or frog) , ameoba and mucor ( penicillium)
C. A flowering plant, tape worm (or ascaris) and a green filamentous algae
D. Mucor (or penicillium), a bird and a toad (or frog)
E. Ameoba, mucor (or penicillium ) and a green filamentous algae

Question 8:

• JAMB 1978

At fertilization

A. One chromosome from the male joins another from the female
B. One gene from the male combines with another from the female
C. The male nucleus fuses with the female nucleus
D. One set of chromosome combines with another set from the female
E. One cell from the male fuses with another from the female

Question 9:

• 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 10:

• JAMB 1978

During reproduction of the organism in figure above the first structure to divide is?

A. 1
B. 2
C. 3
D. 4
E. 5