P-1 Heat — Science STD 10 — Question

In a human, how many chromosmes are present in:an egg which has just been produced by the ovary?

Name one animal and one plant whose stings contain formic acid (or methanoic acid).

Name one variation in humans connected with ears.

A nuclear reactor has half the length of all its control rods inserted in graphite. What must be done so that the reactor produces more heat? Explain your answer.

After complete oxidation of a glucose molecules, ……….. number of ATP molecules are formed.

Write the functions of the following: Penis.

The family of metals having valency two.

State the structural and molecular formula of benzene.

Name two communication Satellites of India?

What type of current is given by

1. A dry cell.
2. A Power House generator.