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Question

Colour of brown hydra is due to

A
Chromoplasts
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B
Zooxanthellae
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C
Zoochlorellae
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D
Both A and B
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Solution

The correct option is C Zooxanthellae
The symbiotic association of some hydra with brown algae called zooxanthallae can lead to the brown pigment associated with it. These zooxanthallae are yellowish-brown and present in invertebrates such as hydra.
'So, the correct answer is Zooxanthellae'

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