8th Grade > Biology
REACHING THE AGE OF ADOLESCENCE MCQs
Total Questions : 57
| Page 5 of 6 pages
Answer: Option D. ->
Type of sperm
:
D
:
D
The sex of a foetus depends on the type of sperm that meets the egg. A sperm carries either a Y chromosome or an X chromosome. Since women carry XX chromosomes, all egg cells (female gametes) formed will be X. If a sperm containing Y chromosome fertilises the egg, offspring will be male, whereas if an X chromosome containing sperm fertilises an egg, the embryo will be female.
Answer: Option D. ->
I, II and III
:
D
Lot of changes occur during puberty in both boys and girls. In girls, ovulation, enlargement of breasts and broadening of hips are the major changes.
:
D
Lot of changes occur during puberty in both boys and girls. In girls, ovulation, enlargement of breasts and broadening of hips are the major changes.
Answer: Option B. ->
one X
:
B
Ovum which is the female gamete always carries an X chromosome. This is because the allosome pair in females consists of two X chromosomes (XX).
:
B
Ovum which is the female gamete always carries an X chromosome. This is because the allosome pair in females consists of two X chromosomes (XX).
Answer: Option B. ->
Transfusion of infected blood
:
B
AIDS is caused by HIV virus. It can spread through various means like:
i. Sexual contact with an infected person.
ii. Transfusion of contaminated blood.
iii. From a pregnant mother to her child during birth or breastfeeding.
It does not spread by:
i. Touching, kissing and socialising with the infected person.
ii. Eating meals with an infected person.
iii. Mosquito bites.
:
B
AIDS is caused by HIV virus. It can spread through various means like:
i. Sexual contact with an infected person.
ii. Transfusion of contaminated blood.
iii. From a pregnant mother to her child during birth or breastfeeding.
It does not spread by:
i. Touching, kissing and socialising with the infected person.
ii. Eating meals with an infected person.
iii. Mosquito bites.
Answer: Option B. ->
menarche
:
B
The reproductive phase of a woman starts from her first period (menarche) at around 10-12 years of age. It continues until the age of 45 to 50, when women stop releasing eggs. This is called menopause. Hence, the reproductive phase of women lies between their menarche and menopause.
:
B
The reproductive phase of a woman starts from her first period (menarche) at around 10-12 years of age. It continues until the age of 45 to 50, when women stop releasing eggs. This is called menopause. Hence, the reproductive phase of women lies between their menarche and menopause.
Answer: Option A. ->
True
:
A
:
A
The testis is the main functional part of the male reproductive system. Some specialised cells of the testis secrete the male hormone, testosterone during puberty. Testosterone is responsible for the formation of sperm as well as secondary sexual characteristics in males.
Answer: Option C. ->
throat
:
C
Thyroid gland is present in the throat region, wrapped around the trachea. It secretes hormones such as thyroxine, T3 and T4. These hormones are very important for regulating normal metabolic activities of the body.
:
C
Thyroid gland is present in the throat region, wrapped around the trachea. It secretes hormones such as thyroxine, T3 and T4. These hormones are very important for regulating normal metabolic activities of the body.
Answer: Option A. ->
11 to 13 years
:
A
:
A
Puberty is the period during which girls and boys become capable of reproduction. Puberty in girls is most commonly observed when they are about 11 to 13 years old.
Answer: Option A. ->
Overdrive of sweat and sebaceous glands
:
A and C
:
A and C
Following changes take place in the body at puberty:
i. Increase in height
ii. Change in body shape
iii. Voice change
iv. Overdrive of sweat and sebaceous glands
v. Development of sex organs
vi. Reaching mental, intellectual and emotional maturity
Answer: Option A. ->
True
:
A
Teenagers is an alternative term that is used for adolescents. The age of adolescence is between 11 to 15 years (teenage). Adolescence is the period after onset of puberty where a child is getting transformed into a reproductive adult.
:
A
Teenagers is an alternative term that is used for adolescents. The age of adolescence is between 11 to 15 years (teenage). Adolescence is the period after onset of puberty where a child is getting transformed into a reproductive adult.
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