Ncert exemplar solutions science class 8 Solutions for Chapter 6 reaching the age of adolescence

The most conspicuous visible change that occurs in boys during puberty is:

Structures present in a cell which is responsible for determination of the sex of a baby is

The belief that the mother is completely responsible for the sex of the child is wrong because the child

Given below are events that lead to pregnancy and development of embryo.

i) Fertilization of egg

ii) Maturation of egg

iii) Release of egg

iv) Embedding of embryo in thickened uterine wall.

Which of the following options gives the correct order of sequence in which they occur?

For the metamorphosis of tadpoles which of the following elements must be available in water

Complete the following sentence:

In females, the uterine wall thickens to receive the _______.

(fertilized egg/sperm)

Complete the following sentence:

Endocrine glands release hormones directly into _________ for transportation to the target site.

Complete the following sentence:

The sex hormones, testosterone, and estrogen are responsible for the development of __________ characters.

Read the statement given below and fill up the blank with the correct word:

Insufficient production of __________ in the tadpoles leads to their incomplete development

Read the statement given below and fill up the blank with the correct word:

Endocrine glands are also called __________ glands.

Read the statement given below and fill up the blank with the correct word:

After attaining puberty boys develop a __________ voice.

Complete the following sentences:

Release of sex hormones is under the control of a hormone secreted from the ______\.

Read the statement given below and fill up the blank with the correct word:

The meal that includes all __________ is a balanced diet.

The hormone which would be released during a situation like a frightened person is ____________.

The hormone which would be released during a situation like growth of a child to adult is ____________.

The hormone which would be released during a situation like the development of caterpillar to moth is ____________.

The hormone which would be released during a situation like the development of tadpole to frog is ____________.