Check the below NCERT MCQ Questions for Class 8 Science Chapter 10 Reaching the Age of Adolescence with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. We have provided Reaching the Age of Adolescence Class 8 Science MCQs Questions with Answers to help students understand the concept very well.
You can refer to NCERT Solutions for Class 8 Science Chapter 10 Reaching the Age of Adolescence to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Reaching the Age of Adolescence Class 8 MCQs Questions with Answers
Choose the correct option in the following questions:
Adolescence is the period of
(a) 5 to 10 years
(b) 11 to 19 years
(c) 22 to 28 years
(d) 30 to 40 years
Answer: (b) 11 to 19 years
When a sperm having X-chromosome fuses with the ovum, the child born will be
(c) male as well as female twin
(d) it depends on the chance of fusion
Answer: (b) female
How many pairs of Chromosomes are found in nuclei of their cells?
(a) 22 pairs
(b) 23 pairs
(c) 24 pairs
(d) 25 pairs
Answer: (b) 23 pairs
Children gain height during
(c) balanced food
Answer: (a) adolescence
Answer: (c) testosterone
Adam’s apple is
(a) enlarged larynx
(b) mammary glands
(c) apple of adam
(d) red apple
Answer: (a) enlarged larynx
The chemical substances which are secreted from endocrine glands are called
Answer: (b) hormones
Out of these which one determines the sex of the baby?
(d) Pituitary gland
Answer: (c) Chromosomes
What is the stoppage of menstruation called?
Answer: (b) Menopause
Which hormone is secreted by adrenal glands?
Answer: (a) Adrenalin
Reproduction age in women starts when their
(a) menstruation starts
(b) breasts start developing
(c) body weight increases
(d) height increases
Answer: (a) menstruation starts
Which is male gonads?
Answer: (d) Testis
The beginning of menstruation at puberty is called
Answer: (c) menarche
In males, the sex chromosome consists
(a) one X and one Y
(b) both X and X
(c) both Y and Y
(d) one M and one X
Answer: (a) one X and one Y
Production of thyroxin requires
Answer: (c) iodine
The period of life, when the body undergoes changes, leading to reproductive maturity, is called
(c) Grown up
(d) Old age
Answer: (b) adolescence
The human body undergoes several changes during adolescence. These changes mark the onset of
(c) Post adolescence
Answer: (a) Puberty
Adam’s apple is prominent in
(a) Boys of any age
(b) Adolescent girls
(c) Girls of any age
(d) Adolescent boys
Answer: (d) Adolescent boys
Larynx is also called
(a) Voice box
(b) Sound box
(c) Black box
(d) All of the above
Answer: (a) Voice box
Acne and pimples on the face is due to secretion of
(a) bile from liver
(b) Oil glands during puberty
(c) Enzymes in the digestive tract
(d) Tear from tear glands
Answer: (b) Oil glands during puberty
Testosterone is a hormone found in human ___
(b) males and females
(c) Females only
(d) Males only
Answer: (d) Males only
The first menstrual flow is called
Answer: (c) Menarche
Menopause occurs at the age of
(a) 10-12 years in boys
(b) 45-50 years in men
(c) 10-12 years in girls
(d) 45-50 years in women
Answer: (d) 45-50 years in women
When a sperm containing Y chromosome fertilizes an egg with X chromosome, the zygote develops into a _____ child
(b) Either a male or female
(d) No child
Answer: (c) Male
The change from larvae to adult is called
Answer: (b) Metamorphosis
Match the following items given in Column ‘A with that in Column B’:
|Column A||Column B|
|(i) Pituitary gland||(a) Thyroxine|
|(ii) Thyroid gland||(b) Adrenalin|
|(iii) Adrenal gland||(c) Insulin|
|(iv) Pancreas||(d) Master gland|
|(v) XX chromosomes||(e) Boy|
|(vi) XY chromosomes||(f) Girl|
|Column A||Column B|
|(i) Pituitary gland||(d) Master gland|
|(ii) Thyroid gland||(a) Thyroxine|
|(iii) Adrenal gland||(b) Adrenalin|
|(iv) Pancreas||(c) Insulin|
|(v) XX chromosomes||(f) Girl|
|(vi) XY chromosomes||(e) Boy|
Fill in the blanks with the appropriate words:
1. Children gain height during …………..
2. The onset of ………….. and ………….. of reproductive parts are controlled by hormones.
Answer: puberty, maturity
3. Hormones are secretions of ………….. glands.
4. Pancreas secretes ………….., thyroid produces ………….. and adrenals produce …………..
Answer: insulin, thyroxine, adrenalin
5. Testosterone is the ………….. hormone.
6. ………….. of the unborn child depends on whether the zygote has XX or XY chromosomes.
7. It is important to eat ………….. and maintain personal hygiene during adolescence.
Answer: balanced food.
State whether the statements given below are True or False:
1. Hormones are secreted from endocrine gland.
2. Adolescence period cover 30-35 years of age.
3. 23 pair of chlorosomes are found in nuclei of the cells.
4. Testes are responsible for production of sperms.
5. Stoppage of menstruation is called adolescence.
6. Mother is responsible for the sex determination of the baby.
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