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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ९

Diptheria affects the ______.

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प्रश्न

Diptheria affects the ______.

विकल्प

  • lungs

  • throat

  • blood

  • liver

MCQ
रिक्त स्थान भरें
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उत्तर

Diptheria affects the throat.

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अध्याय 22: World of Microbes - Exercise [पृष्ठ २७०]

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सामाचीर कलवी Science [English] Class 9 TN Board
अध्याय 22 World of Microbes
Exercise | Q I. 3. | पृष्ठ २७०

संबंधित प्रश्न

How the bread and other products produced using baker’s yeast are nutritious?


a) What is clean technology ?
b) Why is it essential to ban plastic bags?


Gaseous fuel : Coal gas : : ___________ : Coal


Give scientific reason.

Probiotics have got more importance in recent times.


Write a short note.

Microbial Enzymes


Why should we use bioinsecticides?


Read the following paragraph and write the answers to the questions asked.

Sulphuric acid is present in the acid rain and materials coming out of mines. You know that erosion of metals present in statues, bridges and buildings occurs due to it. Sulphuric acid is a source of energy for some species of bacteria like Acidiphilium spp. and Acidithiobacillus ferrooxidans. Hence, these bacteria can control the soil pollution occurring due to acid rain. Water soluble salts of uranium are present in the wastes produced during electroplating and in effluent released in the environment from the atomic energy plant. Geobacter convert these salts of uranium into insoluble salts and thereby prevent those salts from mixing with groundwater sources.

  1. What causes metal erosion in statues, bridges and buildings?
  2. Sulphuric acid is the source of energy for which bacteria?
  3. What kind of pollution do these bacteria control?
  4. What are the water soluble salts in atomic energy plants and in the process of electroplating?
  5. Which bacteria prevent these salts from mixing with ground water by converting them Into insoluble salts?

In the process of making bread the carbohydrates in the flour are fermented by baker's yeast and sugar is transformed into carbon dioxide and ______.


_______ is used as artificial sweetener.


Name the asexual reproductive structure of Penicillium.


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