Curd is formed from the milk. Explain how.

Write a short paragraph on the harmful effects of microorganisms.

Mention two human diseases that are transmitted by a carrier.

Name the process in yeast that converts sugars into alcohol.

Explain and draw nitrogen cycle.

Observe the figure and answer the following questions.

(a) Name the microorganism and the group to which it belongs.
(b) Name the food item on which the organism grows.
(c) Does it grow well in dry or in moist conditions?
(d) Is it safe to eat infected bread?

Typhoid is a ________ disease.

Viruses reproduce only inside the cells of :

Which is not classified as major group of the micro-organisms?

Paheli dug two pits, A and B, in her garden. In pit A, she put a polythene bag packet with some agricultural waste. In pit B, she dumped the same kind of waste but without packing it in a polythene bag. She then covered both the pits with soil. What did she observe after a month?

A disease in human beings caused by virus is

Which of the following reproduces only inside a host cell?

The two microorganisms which live in symbiotic association in lichens are

Pathogenic microorganisms present in host cells are killed by medicines called

The gas released during the preparation of bread is

Alcohol is produced with the help of

Edward Jenner discovered the process of fermentation.

Oxygen and nitrogen make the 78% of air.

Anthrax is the common disease in human and other animals.

Microorganisms can be seen with naked eyes

All microbes are disease causing

Polio

Paramecium

Spirogyra

Aspergillus

Lactobacillus

Name one commercial use of yeast.

Name one nitrogen fixing bacteria?

What are pathogenic microorganisms?

Give two groups of microorganisms which live in colonies.

How many cells are generally present per microorganism?