Reproduction - Jamb Biology Past Questions and Answers

Question 1:

• JAMB 2019

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

Question 2:

• JAMB 2019

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

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

Question 3:

• JAMB 2019

At fertilization

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

Question 4:

• JAMB 2019

The neck region of the tape worm, (taenia) is responsible for the

A. Storage of egg
B. Fragmentaion of the body segment
C. Production of egg
D. development of the suckers
E. Formation of new segment

Question 5:

• JAMB 2019

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

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