Question 1

Unscramble the underlined words in the following sentencesThe reproductive life of a woman lasts from hacreemn to spauoemen.

Accepted Answer

Menarche is the first occurrence of menstruation and marks the beginning of the reproductive period.Menopause is the end of menstruation and marks the end of the reproductive period in women.Therefore, the correct answer is option A.

Question 2

The most conspicuous visible change that occurs in adolescent boys due to puberty is:

Accepted Answer

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Question 3

Which of the following hormones controls metamorphosis in a frog?

Accepted Answer

Correct option: Correct option: This hormone regulates the metabolism of an organism and is also involved in the process of  metamorphosis showing the developmental changes in the life span of an organism.Hence, the correct answer is option (D)

Question 4

Unscramble the underlined words in the following sentences.The overgrowth of sclemus in ynxlar leads to the hoarse voice in adolescent boys.

Accepted Answer

At puberty, the voice box or the larynx begins to grow. Boys develop larger voice boxes. The growing voice box in boys can be seen as a protruding part of the throat called Adam’s apple. In girls, the larynx is hardly visible from the outside because of its small size.Generally, girls have a high-pitched voice, whereas boys have a deep voice.In adolescent boys, sometimes, the muscles of the growing voice box go out of control and the voice becomes hoarse. This state may remain for a few days or weeks after which the voice becomes normal.Thus, the correct answer is option D.

Question 5

How is human male represented?

Accepted Answer

The human male has 22 pairs of autosomes and one pair of sex chromosomes- XY.The human female has 22 pairs of autosomes and one pair of sex chromosomes - XX.So, the correct answer is option C.

Question 6

Number of chromosomes present in a human cell is:

Accepted Answer

There are 23 pairs of chromosomes present in a human cell except for gametes, which makes it a total of 46 chromosomes. Out of these, 22 pairs are autosomes and the remaining one is the pair of sex chromosomes.So, the correct answer is option A.

Question 7

The hormone referred as the male hormone is:

Accepted Answer

Testosterone is the male hormone that promotes maleness. It is the hormone produced by testes. It helps in promoting spermatogenesis, the process of production of sperms. It also promotes secondary sexual characteristics such as body hair growth, muscular development.Thus, the correct answer is option B.

Question 8

Sex of a human child is determined by the:

Accepted Answer

Gametes of the mother (eggs) contain only X chromosomes while gametes of the father (sperms) contain 50% X  and 50% Y chromosomes. So, the child will have one X chromosome from the mother and another X or a Y chromosome from the father. Offspring with XX chromosomes will be a girl and the offspring with XY chromosomes will be a boy.Therefore, the sex chromosome of the father determines the sex of the child.

Question 9

Which of the following endocrine glands is unpaired?

Accepted Answer

The pituitary gland is an endocrine gland. It is present near the base of the brain. It is a gland that is not paired. Whereas, adrenal, testes, ovary are the glands that are paired.So, the correct answer is 'Pituitary'.

Question 10

Which of the following results in a male child?

Accepted Answer

A male produces both X and Y bearing sperms. If the sperm which contains X chromosome fuses with female ovum, it produces a girl child. If the fusion occurs between Y containing sperm and ovum, the baby will be a boy. Thus the correct answer is option B.

Reaching The Age Of Adolescence

Biology
632 Views

Unscramble the underlined words in the following sentences
The reproductive life of a woman lasts from hacreemn to spauoemen.

The most conspicuous visible change that occurs in adolescent boys due to puberty is:

Which of the following hormones controls metamorphosis in a frog?

Unscramble the underlined words in the following sentences.

The overgrowth of sclemus in ynxlar leads to the hoarse voice in adolescent boys.

How is human male represented?

Number of chromosomes present in a human cell is:

The hormone referred as the male hormone is:

Sex of a human child is determined by the:

Which of the following endocrine glands is unpaired?

Which of the following results in a male child?

Reaching The Age Of Adolescence

Biology 632 Views

Unscramble the underlined words in the following sentencesThe reproductive life of a woman lasts from hacreemn to spauoemen.

The most conspicuous visible change that occurs in adolescent boys due to puberty is:

Which of the following hormones controls metamorphosis in a frog?

Unscramble the underlined words in the following sentences. The overgrowth of sclemus in ynxlar leads to the hoarse voice in adolescent boys.

How is human male represented?

Number of chromosomes present in a human cell is:

The hormone referred as the male hormone is:

Sex of a human child is determined by the:

Which of the following endocrine glands is unpaired?

Which of the following results in a male child?

Biology
632 Views

Unscramble the underlined words in the following sentences
The reproductive life of a woman lasts from hacreemn to spauoemen.

Unscramble the underlined words in the following sentences.

The overgrowth of sclemus in ynxlar leads to the hoarse voice in adolescent boys.