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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ९

State whether true or false. If false, correct the statement. Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen. - Science

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प्रश्न

State whether true or false. If false, correct the statement.

Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen.

विकल्प

  • True

  • False

MCQ
सत्य या असत्य
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उत्तर

Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen- True

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 22: World of Microbes - Exercise [पृष्ठ २७१]

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सामाचीर कलवी Science [English] Class 9 TN Board
अध्याय 22 World of Microbes
Exercise | Q V. 1. | पृष्ठ २७१

संबंधित प्रश्न

Why is it necessary to ban the use of plastic bags?


Complete the following conceptual picture with respect to uses.


Complete the following conceptual picture related to environmental management.


There is a oil layer on the water surface of river in your area. What will you do ?


Microbes used along with artificial nitrogenase in organic farming.


Spinosad is a biopesticide.


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?

How microorganisms are useful in the field of medicine?


Diptheria affects the ______.


Complete the chart on production of beverages.

S. No. Fruit Microbe used Role of microbe used Name of beverage
(a) Caffea arabica ______ Separating seeds from fruit Coffee
(b) Theobroma cacao Candida, Hansenula, Pichia, Saccharomyces ______ Cocoa

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