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Question

Escherichia.coli is a/an

A
parasite
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B
saprophyte
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C
epiphyte
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D
symbiont
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Solution

The correct option is D symbiont
Escherichia.coli is found in the large intestine of humans.
In large intestine, it finds its shelter and extracts nutrients and in return it provides B complex vitamins.
Here, both humans and bacteria are mutually beneficial for each other and this mode of nutition is called mutualism. It is also called symbiosis.

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