Give two examples of microbes.

Name the microorganisms that can make their own food by photosynthesis.

Name the four types of bacteria on the basis of shape.

Who is closer to animals; algae or Protozoa? In what aspect?

Some of the microbes that live inside the bodies of animals help them. Give an example.

Give reason as to why curd is added to idlis and bhaturas.

What is the main reason behind the rise to dough when yeast is added to it?

Who discovered the first antibiotic? Name the antibiotic.

A vaccine provides immunity. How?

A female Aedes mosquito is a carrier of a particular disease. name the disease.

An insect can also carry disease with it. yes or no? Give reason.

Viruses can infect humans as well as plants and animals. Give example.

The milk that comes in packets does not get spoiled. Give reason.

Give the best way to preserve items like meat for longer periods.

A chemical is added to pickles to check their spoilage. Name it.

Name an element present in atmosphere that is essential for living organisms.

A type of plants can fix nitrogen gas of air into compounds of nitrogen. Give its name.

Is the decomposition of the bodies of dead plants and animals by microorganisms desirable?

Explain fixation of nitrogen.

Give one important use of algae.

A microorganism is used in baking industry. Name it.

The parasite of malaria and dengue spread by which insects?

Yeast used to prepare food items. Name them.

Write about Louis Pasteur.

Name a disease caused by bacteria.

Rohit saw his mother adding a little curd to warm milk to set curd for next day. Why does she do?

Does salt prevent food spoilage? How?

It is advised to wash hands before handling food. Give reasons.

Microorganisms are an essential part of our life. Justify the statement.

Write the importance of nitrogen-fixing bacteria in soil.

How do algae differ from fungi?

Explain the process of binary fission.

Elucidate the use of fungi and their harmful effects.

Comment

(a) Curd turns sour faster in summer.

(b) Viruses are neither living nor non-living.

Write the role of immunization in eradicating diseases from a country.

Why should we not let water collect in coolers?

Write the different methods of food preservation.