Q 1 – The adolescence period is
(a) 14 – 20 years
(b) 10 – 18 years
(c) 11 – 19 years
(d) none of these
Q 2 – Initially girls grow
(a) slower than boys
(b) faster than boys
(c) both of these
(d) none of these
Q 3 – Puberty age in males is
(a) 12 – 14 years
(b) 13 – 15 years
(c) 10 – 12 years
(d) 18 – 20 years
Q 4 – The male hormone is called
(a) estrogen
(b) testosterone
(c) thyroxine
(d) insulin
Q 5 – Menstruation occurs once in about
(a) 28 to 30 days
(b) 25 to 30 days
(c) 45 to 50 days
(d) none of these
Q 7 – The unfertilised egg always has ______ chromosome.
(a) X
(b) Y
(c) XY
(d) XX
Q 7 – The unfertilised egg always has ______ chromosome.
(a) X
(b) Y
(c) XY
(d) XX
Q 8 – The gametes have only
(a) one set of chromosomes
(b) two sets of chromosomes
(c) three sets of chromosomes
(d) none of these
Q 9 – Production of thyroxine requires
(a) magnesium
(b) iodine
(c) sodium
(d) bromine
Q 10 – Which of the following determines the sex of the baby?
(a) Chromosomes
(b) Chloroplast
(c) Hormones
(d) Pituitary gland
Q 11 – Fill in the blanks
- ___________ means to grow into maturity.
- Children gain height during ___________.
- The boys and girls passing through the adolescence period are called ___________ or ___________.
- During puberty, a change in voice takes place due to the increase in the size of ___________ or ___________.
- The stage when the menstrual cycle stops is called ___________.
Q 12 – True or false
- The age of adolescence is 15 to 20 years.
- The female puberty starts at the age of 12 to 14 years.
- Boys have enlarged and well developed Adam’s apple.
- Insulin is secreted by pituitary gland.
- The chemical substances secreted by endocrine glands are called hormones.
Q 13 – Match the following
Column A | Column B |
1. Pituitary gland | (a) Thyroxine |
2. Thyroid | (b) Adrenalin |
3. Adrenals | (c) Insulin |
4. Pancreas | (d) Growth hormone |
5. XX chromosomes | (e) Boy |
6. XY chromosomes | (f) Girl |
Q 14 – What is meant by adolescence?
Q 15 – What is puberty?
Q 16 – What are secondary sexual characters?
Q 17 – Explain the development of sex organs in male and female.
Q 18 – Why do changes occur in human body at puberty?
Q 19 – How do hormones work in human body?
Q 20 – What are sex hormones? How do they work in the human body?
Q 21 – What is menstruation?
Q 22 – What are the changes in female at the onset of puberty?
Q 23 – What changes occur in human at puberty?
Q 24 – Explain the reproductive phase of life in humans.
Q 25 – Explain sex determination in human.