List of top Science Questions on Microorganisms

What are decomposers? Explain how the decomposers (i) keep the environment clean, and also (ii) replenish the soil nutrients.

An organism which breaks down the food material outside the body and then absorbs it is:

What are decomposers? List two consequences of their absence in an ecosystem.

Select from the following the conditions responsible for the rapid spread of black mould on a slice of bread: (i) Formation of large number of spores (ii) Presence of moisture and nutrients in bread (iii) Low temperature (iv) Presence of hyphae

Which of the following is used as wine?

Match the organisms in Column A with their action in Column B.

The bread or idli dough rises because of

The most common carrier of communicable diseases is

Carrier of malaria-causing protozoan is

The following is an antibiotic

Yeast is used in the production of

Fill in the blanks.
1. Microorganisms can be seen with the help of a ___.
2. Blue-green algae fix ___ directly from the air and enhance the fertility of the soil.
3. Alcohol is produced with the help of ___.
4. Cholera is caused by ___.