Microbes in Human Welfare BIOLOGY - Microbes in Human Welfare

Citric acid is produced by which of the following micro-organisms

Microbe, which is used as bio-fertilizer, is:

Toddy is prepared by fermenting the secretion obtained from which part of the palm tree?

Which of the following is beneficial in getting rid of aphids and mosquitos?

In 'fed batch' fermentation method, the process of continuously adding sugar is done for which of one of the followings?

The puffed-up appearance of dough fermented by bacteria is due to the production of _________ gas.

Azotobacter is a _________ bacteria which increases the amount of nitrogen in the soil by fixing atmospheric nitrogen.

_________ microbes are used as bio-fertilizers.

Baculoviruses attack and kill the insects and arthropods, this is an example of _________.

Microbes used in the production of biogas are called _________.

Write the name of microorganism used in bread making

Name the microbe which is known as brewer's yeast. Write its one use.

Name any two species of fungus, which are used in the production of the antibiotics.

(i) Write the name of one such genus of fungus which establishes mycorrhizae relationship with plants.
(ii) How do the plants get benefitted from this relation?

In order to improve soil fertility, farmers are often advised to add the following microbes to the fields. Explain.
(a) Rhizobium (b) Anabaena

Explain role of microorganisms in sewage treatment.

Do you think microbes can also be used as source of energy? If yes, how?

What is sewage? In which way can sewage be harmful to us?

In which way have microbes played a major role in controlling diseases caused by harmful bacteria?

Name some traditional Indian foods made of wheat, rice and Bengal gram (or their products) which involve use of microbes.

Draw a labelled diagram of biogas plant.

What is the key difference between primary and secondary sewage treatment?

Find out the role of microbes : Single Cell Protein (SSP)

Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A, B and C; but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20mg / L 8mg/L and 400mg/L, respectively. Which sample of the water is most polluted? Can you assign the correct label to each assuming the river water is relatively clean?

Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes with the help of a microscope, which sample would you carry and why?

Microbes can be used to decrease the use of chemical fertilisers and pesticides. Explain how this can be accomplished.

What is mycorrhiza? Write its main advantages.

Explain the following with reason :

Describe the beneficial activities of bacteria. ###How can we say that bacteria are our friends? Explain.

What are bacterial phages? Describe their structure in detail.