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  • Please help! How many organisms in the list given below are autotrophs?Lactobacillus , Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosomes, Porphyra, Wolffia

How many organisms in the list given below are autotrophs?

Lactobacillus , Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosomes, Porphyra, Wolffia

  • Option 1)

    Four 

  • Option 2)

    Five 

  • Option 3)

    Six 

  • Option 4)

    Three 

 

Answers (2)

 

Cyano bacteria / Blue green algae -

  • Gram negative, photosynthetic, prokaryotes.
  • Contain chlorophyll – a, carotene, phycobilin.
  • Cell membrane lacks sterol.
  • Reserve food material is cyanophycin protein, Cyanophycean starch, lipid globules.
  • Non flagellate, moment by gliding motion,
  • Some of them can fix atmospheric nitrogen in heterocysts.

Eg. Nostoc and anabaena,

- wherein

Eg. Trichodesmium erythreum, Nostoc commune.

 

 Nitrosomonas and Nitrobacter are chemosynthetic autotrophs, and Nostoc, Chara, Porphyra and worffia are photosynthetic autotrophs


Option 1)

Four 

This is incorrect option

Option 2)

Five 

This is incorrect option

Option 3)

Six 

This is correct option

Option 4)

Three 

This is incorrect option

Posted by

Vakul

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Six

Posted by

Bhavana

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