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The gland A is attached to the wind pipe in the human body. The gland A makes and secretes a hormone B which controls the metabolism of carbohydrates, fats and proteins in the body. The non-metal element C is necessary for the formation of hormone B. The deficiency of C in the diet can cause a deficiency of hormone B in the body leading to a disease D in which the neck of a person appears to be swollen. People are advised to use salt E in cooking food so as to avoid disease D.

(a) Name (i) gland A, and (ii) hormone B.

(b) What is the element C ?

(c) Name one type of food which can provide sufficient C in the diet of a person.

(d) Name (i) disease D, and (ii) salt E.

Which one of the following is not a function of insulin?

_______is a protein pigment that is responsible for different skin colour in humans.

All cells in our body maintain a definite shape with the help of:

State whether the following statements are true (T) or false (F). If false, correct them by changing any one single word in each.

(a) Deafness is caused due to rupturing of the pinna. (T/F)

(b) Semi circular canals are concerned with static (positional) balance. (T/F)

Four students labelled the diagram of an onion peel in the following ways. The correctly labelled diagram is

How do Mendel’s experiments show that traits may be dominant or recessive?

Question 1
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic makeup of the tall parent can be depicted as
(a) TTVV
(b) TTvv
(c) TtVV
(d) TtVv

In many tumours, there is a blood vessel growth
in the direction of tumours. the phenomenon is known as

How do organism reproduce

Athletes are often trained at high altitude because:

Which of the following statements about the adrenal gland is correct?

Which among the following is/are not a copper releasing IUDs?

One of the following does not reproduce by spore formation method. This is :
(a) Rhizopus fungus
(b) Penicillium fungus
(c) Yeast fungus
(d) Mucor fungus

Artificial insemination and embryo transfer are used in animal husbandry

How is Robert brown

Cheese and yoghurt are products of

The sense of equilibrium by ear is the function of

An organism with two identical copies of the same gene is called_______

What is SA node and AV node? Where are they located? What are their functions?

Assertion (A): Differences in a population are created by genetic variations.

Reason (R): Driving factor for variation is the source of sexual reproduction and also asexual reproduction.

what are the uses of concave and convex lens?

The following statements about AIDS are correct, except:

Paheli noticed water being pulled up by a motor-pump to an overhead tank of a five-storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell how?

................. side of the heart pumps only deoxygenated blood.

Rifamycin is effective against ___

Parthenocarpic fruits can be produced by