Reaching The Age of Adolescence | Chapter Assessment | English | Grade 8

One can say that he/she has reached the end of puberty when he/she has _______________ .

• started to undergo changes, leading to reproductive maturity

• reached a certain age

• reached reproductive maturity

Answer explanation

Puberty end when an adolescent has reached reproductive maturity. Reaching a certain age is not an indication of the end of puberty, even though most of the people reach reproductive maturity at a certain age. Puberty is defined to end when the person reaches reproductive maturity.

Generally, the growth in height stops at the age of ___ .

• 16

• 17

• 18

• 19

Answer explanation

Generally, both, boys and girls, reach their 100% height by the age of 18.

All parts of the body grow at the same rate.

• TRUE

• FALSE

Answer explanation

All parts of the body do not grow at the same rate. Long bones, as of arms and legs, grow faster than other bone, as of face. This is why many teenagers have a full grow body but not a completely grown face.

All the changes occuring in adolescent boys and girls are the same.

• TRUE

• FALSE

Answer explanation

All the changes during adolescence are not the same between boys and girls. For example, in boys, the shoulders widen whereas in girls, the region below the waist widens, during the age of adolescence.

Boys have a deep voice because of the ____________ .

• big size of the larynx

• small size of the larynx

Answer explanation

In boys, the larynx or the voice box grows significantly larger than in girls. This is can be seen as a protruding part of the throat called Adam's apple.

Which gamete determines the sex of the new born child?

• Male Gamete

• Female Gamete

• Both, male and female gamete

• Neither male nor female gamete

Answer explanation

It is the male gamete that determines the sex of the child. All the unfertilized eggs have X chromosomes, whereas the sperms have either X or Y chromosomes. The sex of the child depends on which sperm fertilizes with an egg, if the sperm that fertilized with an egg contains X chromosomes, then it's a girl, if it contains Y chromosomes, it's a boy.