How many organisms in the list given are autotrophs Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Trypanosoma, Porphyra, Wolffia

Four

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Five

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Six

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Three

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Solution

The correct option is B Six
Autotrophs are organisms which are capable of synthesizing their food themselves from organic and inorganic substances. Out of the given examples, Nostoc, Chara, Porphyra and Wolffia are photsynthetic autotrophs and Nitrosomonas and Nitrobacter are chemosynthetic autotrophs. Trypanosoma is parasitic organism. Lactobacillus, Streptomyces are heterotrophs.
Thus, the correct answer is option C.

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Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia

N_{2}

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