Improvement in Food Resources — Science STD 9 — Question

Which of the following in natural insecticides?

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

AIDS is mainly caused by:

1. Sexual intercourse.
2. Blood transfusion.
3. Through placental transfusion.
4. All of the above.

Which of the following is the largest phylum?

1. Arthropoda.
2. Ametida.
3. Mollusca.
4. Cnidaria.

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.

Soil that is best suited for plant growth is:

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

The phylum of sedentary animals is:

1. Mollusca.
2. Echinodermata.
3. Porifera.
4. Both (a) and (b).