Big and bulging throat is a symptom of goitre, which is a disease of thyroid gland.
The correct option is A.

When the male contributes the gamete with Y chromosome, it fuses with the egg to form XY, which means the baby born will be male.
The given statement is True.

Apart from simulating testes and ovaries to regulate hormones, pituitary also secretes growth hormone which is necessary for the normal growth of a person.
The correct option is B.

• The anterior pituitary secretes FSH (follicle-stimulating hormone) and LH (luteinizing hormone) which are necessary for the development and hormonal secretion of the testis and ovary.
  
• Thus, the pituitary is the master gland that controls the secretion of the ovary and testis.

The correct option is B.

The pancreas secretes the hormone insulin, and if insulin is not secreted in sufficient amounts, the person suffers from diabetes.
The correct option is D.

The process of metamorphosis in frogs is controlled by the thyroid gland that releases thyroxine in the presence of iodine in water. In the absence of iodine in water tadpoles cannot convert from tadpole to adult frogs.

Iodine affects the amount of thyroxine produced and if there is lack of iodine, low levels of thyroxine may lead to goitre.
The given statement is True.

Thyroid glands secrete thyroxine while adrenal glands secrete adrenaline but only when simulated by the pituitary gland.
So, the given statement is True.

Thyroxine production requires the presence of Iodine and lack of Iodine will lead to lack of thyroxine and consequentially lead to goitre.

The correct option is C.

Insect hormones control the process of metamorphosis in insects.
The correct option is A.

The tadpole passes through certain stages to become a frog and its change from larva to adult is
called metamorphosis.
The correct option is A.

Frogs undergo the process of metamorphosis when they turn into ana dult from larvae. This process is controlled by thyroxin hormone wich is produced by thyroid glands.
The given statement is False.

Iodised salt is really important for consumption as it provides iodinw which regulates the hormone thyroxine and prevents goitre.
The given statement is True.

The process of metamorphosis is controlled by the hormo thyroxine, which is produces by thyroid gland.
The correct option is A.

In our country, the legal age for marriage is 18 years for girls and 21 years for boys. This is because teenage mothers are not prepared mentally or physically for motherhood.
The correct option is C.

Yes, it is a myth that a girl should not be allowed to work in the kitchen during menstruation. This type of ideology should be discarded as bodily changes have nothing to do with someone working in the kitchen.
The given statement is True.

Milk is a balanced food as it includes proteins, carbohydrates, fats and vitamins in requisite proportions.
The correct option is B.

If anybody suggests that you will get relief if you take some drugs, just say No unless prescribed by the doctor.

The given statement is True.

Teenagers need to take extra care of their personal hygiene as with this age, sweat glands become more active and not taking bath every day can lead to bad body odour and may lead to various infections.
The given statement is True.

It is a taboo that the mother is responsible for the sex of the child. The father may either contribute an X or a Y chromosome to the child which determines the sex of the baby.
The given statement is False.

HIV (Human immunodeficiency virus) is the causative agent of AIDS. HIV is spread from an infected person to another person through direct contact with some of the body’s fluids like mother milk, blood, lymph, and semen through sexual intercourse or by sharing the drug equipment like needles or from mother to child during childbirth or breastfeeding or via blood transfusion.
The given statement is true.

• AIDS is caused by a virus called HIV (Human immunodeficiency virus).
• This virus can pass on to a normal person from an infected person through sexual intercourse, sharing needles, syringes, or other drug-injection equipment

The correct option is B.

Goitre is caused by low secretion of the hormone thyroxine by the thyroid gland and not insulin by the pancreas.
The given statement is False.

Green leafy vegetables are a good source of vitamins and iron and are good for health.
the given statement is False.

Mother's milk provides all the nourishment that an infant requires.
The correct option is C.

Calculation for full height:

• The secondary sexual characters refer to sex-specific characters of males and females.
• Female secondary sexual characters are a feminine pattern of body hair and fat distribution. 
• Male secondary sexual characters include stimulated synthesis of structural proteins of skeletal muscles and bones, voice deepening, growth of facial, axillary and pubic hairs etc. 

Calculation for full height (cm) = (Present height/Percentage of full height at this age) * 100 

Amphibian metamorphosis is controlled by thyroid hormone (TH). Amphibian metamorphosis depends on upon the amount of iodine secured by the larvae; the greater the quantity the more rapid the differentiation.