E. Complete the patterns.
- Chickenpox :: Bacteria : Typhoid
By air : Common cold ::
Contaminated water
- : Fish :: Sweetening : Jams, Jellies
4. Yeast :
:: Lactobacillus : Milk to Curd
5. Coccus : Spherical bacteria :: Bacillus :
Answer the following questions in one word or a sentence.
1. How are bacteria able to survive harsh weather conditions?
2. Name any parasitic protozoan.
3. What is fermentation?
4. How does sugar How does foot and mouth disease spread in cattle?
Answers
E. Answers:
1. Virus : Chickenpox : : Bacteria : Typhoid
2. By air : Common cold : : Contaminated water : Cholera
3. Adding salt or oil : Fish : : Sweetening : Jams, Jellies
4. Yeast : Sugar to Alcohol : : Lactobacillus : Milk to Curd
5. Coccus : Spherical bacteria : : Bacillus : Rod-shaped bacteria
F. Answers:
1. Bacteria are able to survive harsh weather conditions because of their various survival mechanisms. They produce a number of enzymes and proteins which help them to overcome harsh conditions.
2. Plasmodium is a parasitic protozoan which causes malaria.
3. The process of conversion of sugar into an acid or an alcohol by the action of microorganisms is called fermentation. It generally results in the formation of carbon dioxide and alcohol.
4. Foot and mouth disease is caused by a virus in cattle. Its mode of transmission is air or contact with other diseased animals.
Answer:
virus
cholera
salt
sugar to alcohol
rod shaped bacteria
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