Q3 of 9 Page 95

Identify the odd word out and say why it is the odd one?

A. Pneumonia, diphtheria, chicken pox, cholera.


B. Lactobacilli, rhizobia, yeast, clostridia.


C. Root rot, rust (tambera), rubella, mozaic.

A. The odd one out is: Chicken pox.


Explanation: Chicken pox is a disease caused by virus. Pneumonia, diphtheria, and cholera are caused by bacteria.


B. The odd one out is: Yeast.


Explanation: Yeast is a fungus. Lactobacilli, rhizobia, and clostridia are bacteria.


C. The odd one out is: Rubella.


Explanation: Rubella is a disease caused by bacteria that occurs in humans. Root rot, rust (tambera), and mosaic are the plant diseases caused by fungi.


More from this chapter

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1

Complete the statements using the proper option from those given below. Explain the statements.

(Mycotoxins, budding, rhizobium)


A. Yeast reproduces asexually by the ............. method.


B. Toxins of fungal origin are called............. .


C. Leguminous plants can produce more proteins due to............. .

 2

Write the names of microbes found in following food materials.

Yoghurt, bread, root nodules of leguminous plants, idli, dosa, spoiled potato curry.

 4

Give scientific reasons.

A. Foam accumulates on at the surface of ‘dal’ kept for a long time in summer.


B. Why are naphthalene balls kept with clothes to be put away?

 5

Write down the modes of infection and the preventive measures against fungal diseases.