The Fundamental Unit of Life — Science STD 9 — Question

Presence of tissues in a multicellular organisms ensures:

1. Faster development.
2. Division of labour.
3. Higher reproductive potential.
4. Body strength.

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.

Starfish belongs to phylum:

1. Mollura.
2. Coelenterata.
3. Arthropoda.
4. Echinodermata.

Biosphere occurs:

1. In lithosphere.
2. In lithosphere and hydrosphere.
3. At place of interaction of lithosphere, hydrosphere and atmosphere.
4. In atmosphere and hydrosphere.

Explain various modes of transmission of infectious diseases.

Soil is the component of:

1. Atmosphere.
2. Hydrosphere.
3. Lithosphere.
4. None of the above.

In chronic disease a patient suffers from:

1. Poor appetite.
2. Short breath.
3. Tiredness.
4. All the above.

Growing two or more crops in definite row pattern is:

1. Mixed farming.
2. Mixed cropping.
3. Inter-cropping.
4. Crop rotation.