Atoms and Molecules — Science STD 9 — Question

Which one of the following nutrients is not available in fertilizers?

Cell wall of prokaryotes is made up of:

The ratio of the total work done or total energy consumed to the total time taken is called:

When a mixture of iron powder and sulphur powder is heated strongly to form iron sulphide, then heat energy is:

1. Released.
2. First absorbed and then released.
3. Absorbed.
4. Neither absorbed nor released.

Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17?

The method maximum used in cattle breeding is:

New cells arise from pre-existing cell is the statement given by:

A particle starts from the origin at t = 0s with a velocity of 10.0j m/ s and moves in the xy−plane with a constant acceleration of the ms⁻². Then y−coordinate of the particle in 2 sec is

A cell places in hypotonic solution will:

1. Shrink.
2. Show plasmolysis.
3. Swell up.
4. No change in shape or size.

Metamerism is characteristic feature of:

1. Chordata.
2. Annelida.
3. Mollusca.
4. Nematoda.