Tissues — Science STD 9 — Question

Find out the correct sentence about manure.

1. Manure contains large quantities of organic matter and small quantities of nutrients.
2. It increases the water holding capacity of sandy soil.
3. It helps in draining out of excess of water from clayey soil.
4. Its excessive use pollutes environment because it is made of animal excretory waste.

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

Select the odd one out:

In a hypotonic solution, the cell:

Which of the labeled parts of the cell is its controlling centre:

Fertilizers cause:

1. Eutrophication of water bodies.
2. Killing of most microorganisms.
3. Destruction of crumb structure of soil.
4. All the above.

All the elements of life support system are:

1. Inter-related.
2. Inter-dependent.
3. Interconnected.
4. All the above.

Which of the following in natural insecticides?

1. Nicotine
2. Neem
3. Pyrethrum
4. All of these

Identify the organelle present only in animal cells:

Some crops are grown in Kharif season, from the month of:

Homo : generic name :: Sapines : ……...

1. Species name.
2. Human name.
3. Division name.
4. Organism name.