1. Rahul was a student of Class VII. His father purchased a new bicycle for him on his birthday. After few months, he found that the cycle chain and even the handle gets rusted. His father advised him to apply a coating of paint to the cycle and not to keep it in the open in future. Now, answer the following questions:
(a)Why his cycle gets rusted?
(b)What do you mean by rusting of iron?
(c)What values are shown by Rahul’s father?

His cycle got rusted bcoz as his cycle was made of iron which came in contact with oxygen and got rusted.

Rusting is the phenomenon of the deposition of a reddish-brown coating on the surface of iron by the action of moist air, and the reddish-brown coating is known as rust.

He knew that the cycle would surely get rusted in the presence of water and oxygen. This shows his knowledge of science.

Explanation:

a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.