The Fundamental Unit of Life — Science STD 9 — Question

Soil erosion is caused due to:

1. Strong wind.
2. Heavy rains.
3. Keeping the fields fallow for a long.
4. All of these.

Phylogeny is study of:

1. Development of an indicidual.
2. Evolution of species.
3. Embryonic development of an organ.
4. Ecological adaptation of an organisms.

Which of the following is the exception of cell theory?

Which among the following leads to an increase in ground water levels?

Which of the following is broad leaf weed?

1. Chenopodium
2. Convolvulus
3. Amaranthus
4. All of the above

Droplet method of transmission of disease is found in:

1. Common cold.
2. AIDS.
3. Hepatitis.
4. Syphilis.

The principal cereal crop of India is:

1. Wheat
2. Rice
3. Maize
4. Sorghum

A fat person is less affected by the cold wheather because of the presence of more.

The smallest known cell is:

Poultry fowl are susceptible to the following pathogens.

1. Viruses
2. Bacteria
3. Fungi
4. All the above