Improvement in Food Resources — Science STD 9 — Question

Well defined nucleus is absent in:

To which height is ozonosphere present over the equator:

1. 11–16km
2. 23–25km
3. 16–20km
4. 10–12km

Who has proposed two kingdom classification?

1. R.Whittaker.
2. Carolus Linnaeus.
3. Schimper.
4. Eichler.

Aleuroplasts in a cell store:

1. Starch.
2. Oil.
3. Protein.
4. Nutrients.

Identify the organelle present only in animal cells:

Which one of the following tissue gives mechanical support to young dicotyledonous stem?

In a natural ecosystem, decomposers include:

1. Bacteria and fungi.
2. Parasitic algae.
3. Macroscopic animals.
4. All the above.

Biological weathering is caused by:

1. Lichens.
2. Mosses.
3. Roots of plants.
4. All the above.

A cell placed in solution swells up. The solution is:

1. Hypertonic
2. Isotonic
3. Hypotonic
4. Both a and b

Wheat, gram and peas are examples of: