If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?

2

(a)

What are the functions performed by the testis in human beings?

2

(a)

Why does menstruation occur?

2

(a)

Draw a labelled diagram of the longitudinal section of a flower.

2

(a)

What could be the reasons for adopting contraceptive methods?

2

(a)

Colonies of yeast fail to multiply in water, but multiple in sugar solution.Give one reason for this.

2

(a)

Why does bread mould grow profusely on a moist of bread rather than on a dry slice of bread?

2

(a)

What is 'reproduction'?Mention the importance of DNA copying in reproduction.

2

(a)

"Variation that confer an advantage to an individual organism only will survive in a population".Justify

2

(a)

Define the term puberty.List two changes observed in girl at the time of puberty.

2

(a)

What is meant by asexual reproduction?List its any two different forms.

2

(a)

Write two examples each of sexually transmitted disease caused by (i)virus, (ii)bacteria.Explain how the transmission of such diseases be prevented?

2

(a)

Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure 'D' and 'E' by indicating the regenerated regions.

2

(a)

Name the parts A, B and C shown in the following diagram and state one function of each.

2

(a)