Tissues — Science STD 9 — Question

Wind breaks are:

1. Raising edges of fields.
2. Growing grasses altemating with crops.
3. Mud walls.
4. Rows of trees and shrubs.

Canal syste system is present in phylum:

1. Cnidaria.
2. Echinodermata.
3. Porifera.
4. Protozoa.

Causes of water pollution are:

1. Inorganic.
2. Organic.
3. Biological.
4. All of these.

The codes for the specific proteins produced by a cell lies in the ________.

The history of the cell began in 1665 with the publication of Micrographia in London by:

1. Robert Hooke
2. Robert Brown
3. Straburger
4. Dujardin

Fluid part of blood after removal of corpuscles is ______________.

Soil that is best suited for plant growth is:

1. Clayey.
2. Loam.
3. Sandy.
4. Gravel.

Which one of the following is cold-blodded animal?

1. Birds.
2. Monkey.
3. Rat.
4. Lizard.

Alikunhi is famous for development of the technique of:

1. Hypophysation
2. Composite fish culture.
3. Mariculture
4. Shell culture.

Organisms such as lichens are very sensitive to the level of ___________ in the atmosphere.

1. Carbon dioxide.
2. Sulphur dioxide.
3. Carbon monoxide.
4. Methane.