Reaching the Age of Adolescence

When a sperm having X-chromosome fuses with the ovum, the child born will be ______.

• (a) male

• (b) female

• (c) male as well as female twin

• (d) it depends on the chance of fusion

Answer explanation

Testes secrete _____.

• Thyroxine

• Estrogen

• Testosterone

• Insulin

How many pairs of Chromosomes are found in nuclei of their cells?

• 22

• 21

• 25

• 23

The beginning of menstruation at puberty is called ____.

• ovulation

• adolescence

• menarche

• menopause

Pancreas secretes ………….., thyroid produces ………….. and adrenals produce ………….. .

Identify the correct sequence that is followed during the growth of human being?   

• 2, 3, 1, 4, 7, 6, 5.

• 2, 1, 3, 4, 7, 5, 6. 

• 3, 2, 1, 4, 6, 7, 5.

• 1, 3, 2, 4, 7, 6, 5.

What do X, Y and Z represent in the given figure?

• X-Ovum, Y-testes, Z-Ovulation

• X-Testes, Y-Ovum, Z-lmplantation

• X-Ovum, Y-Testes, Z-lmplantation

• X-Testes, Y-Ovum, Z-Fertilization

The gametes have ____ of chromosomes.

• a pair

• two pairs of

• three pairs of

• one set

Production of thyroxine requires ______.

• Magnesium

• Iodine

• Sodium

• Potassium

Which of the following glands secretes oil?

• Thyroid gland

• Pituitary gland

• Sebaceous gland

• Adrenal gland