Answer: Option B. -> adolescence
:
B
Adolescence is the intermediate growing stage between childhood and adulthood. During adolescence, the body undergoes many physical and psychological changes and attains reproductive maturity. This period varies from person to person.

Answer: Option C. -> (i) Growth hormone - releasing hormone, (ii) Pituitary gland
:
C
The hypothalamus regulates all the secretions of the master gland pituitary, which in turn regulates the secretions of all other endocrine glands. In the given flow chart, the hypothalamus secretes growth hormone - releasing hormone, which stimulates the pituitary gland to release growth hormone (GH). This hormone is responsible for increasing height by causing elongation of limbs in both boys and girls.

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.

Answer: Option C. -> ovum
:
C
The vaginal fluid shed during menstrual bleeding contains the unfertilized egg and the thickened endometrial liningof uterus along with blood vessels.

Answer: Option C. -> Goitre
:
C
Iodine is essential for the production of thyroxine.In an attempt to produce more thyroxine, the gland enlarges. This condition is called goitre.

Answer: Option B. -> Chapathi, dal and vegetables
:
B
Adolescents, like everyone else, should have a balanced diet, which should include all types of nutrients. Also, the diet should consist of less refined and packaged foods. Hence, the best option for an adolescent's meal will be chapati, dal and vegetables.

Answer: Option C. -> throat
:
C
Thyroid gland is present in the throat region, wrappedaround the trachea.It secretes hormones such as thyroxine, $T_3$ and $T_4$. These hormones are very important for regulating normal metabolic activities of the body.

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.

Answer: Option B. -> one X
:
B
Ovum which is the female gamete always carries an X chromosome. This isbecausethe allosome pair in females consists of two X chromosomes (XX).

Answer: Option D. -> hypothalamus
:
D
Thepituitary glandis a pea-sized gland locatedjust below the hypothalamus which is connected to the pituitary via a bundle of nerve fibres. It is known as the master gland of the endocrine system as itproducesall the critical hormoneswhich regulates the secretions of all other endocrine glands.