No, these are not healthy eating habits because burgers and potato chips have very little nutritional value. Although, these are very tasty but can never replace regular meals as balanced diet which is essential for the adolescents for their normal growth and development.

Sex chromosomes contributed are as given below:
Ayesha - X Aman - X Kriti - X Kartik - Y

Two features seen in boys at puberty are
(i) Growth of facial hairs.
(ii) Voice becomes hoarse.
Two features seen in girls at puberty are
(i) Development of breasts.
(ii) Region below the waist becomes wider.

The reproductive life, i.e. capacity for maturation and production of gametes lasts for a much longer time in males than in females. In females, the reproductive phase of life begins at puberty (11-13 years of age) and generally lasts till the age of approximately 45-50 years. Thus, reproductive life once begun, continues in males and ends in females.

Menstruation is the monthly reproductive cycle that occurs in women once in about 28-30 days. It is the release of unfertilised egg along with blood.
If the egg released from ovary does not get fertilised, the released egg and the thickened lining of uterus along with its blood is released out from body.

(a) Some of the changes are
(i) Increase in height.
(ii) Change in body shape.
(iii) Voice change.
(iv) Development of sex organs.
(v) Hairy line above the lips.
(b) This special period of life is known as adolescence. During this period, body undergoes changes leading to reproductive maturity.
(c) At puberty, the larynx beings to grow so that boys develop larger voice boxes. Sometimes, the muscles of the growing voice box go out of control and the voice becomes hoarse.
(d) Hormones (i.e. testosterone in this case) is responsible for these changes.
(e) The teacher is patient, observant and devoted to his duty.

(a) Adam's apple The protruding part of the growing voice box is called Adam's apple in males. In boys, voice box (larynx) develops larger than girls and this protruding part is seen as bulge in the neck area.
(b) Secondary sexual characters The physical features that help to distinguish the males from the females are called secondary sexual characters. These characters develop at the time of puberty. The secondary sexual characteristics in humans are given below:
In males,
(i) Growth of pubic hair, beard and moustaches.
(ii) Hair on chest and underarms.
In females,
(i) Enlargement of breasts.
(ii) Appearance of pubic hair, hair under arms.
(c) Sex determination of the unborn baby Sex of the unborn baby is determined by the sex chromosomes, i.e. X and Y. A female has two X-chromosomes, while a male have one X and one Y-chromosome.
So in females, the gamete, i.e. egg have only one X-chromosome but in males, the sperm, i.e. male gamete may have an X-chromosome or V-chromosome. If the egg fertilises with sperm containing X-chromosome, the zygote will develop into a female (XX) and if the egg fertilises with sperm containing V-chromosome, the zygote will develop into a male (XY).

Adrenaline hormone maintains the correct balance of salts in the blood.

Testosterone is involved in the development and controls to the reproductive organs and secondary sexual characteristics.

Oestrogen is the female hormone produced by ovaries that help in development of breasts/mammary glands.

(a) Target site
(b) Sweat glands
(c) Hormones
(d) Puberty

Testosterone is the male hormone which is released from the testes at the onset of puberty.