Tissues — Science STD 9 — Question

Nitromonas bacteria convert:

1. Nitrite to nitrate.
2. Ammonia into nitrate.
3. Ammonia into nitrite.
4. Nitrite into ammonia.

Areolar connective tissue is found around:

AIDS is due to:

1. Reduction to number of helper T-cells.
2. Reduction in number of killer T-cells.
3. Autoimmunity.
4. Non-production.

A cell will swell up if:

Inland fisheries is referred to:

1. Culturing fish in freshwater.
2. Trapping and capturing fishes from sea coast.
3. Colchicine treatment.
4. Breeding with their wild relatives.

If crop rotation is done properly then:

Poultry farming is undertaken to raise following:

1. Egg production.
2. Feather production.
3. Chicken meat.
4. Milk production.

1. (i) and (ii)
2. (i) and (iii)
3. (ii) and (iii)
4. (iii) and (iv)

Phylogeny is study of:

1. Development of an indicidual.
2. Evolution of species.
3. Embryonic development of an organ.
4. Ecological adaptation of an organisms.

The science of classification is called:

1. Demography.
2. Taxonomy.
3. Biology.
4. None of the above.

Which of the following have been artificially selected?