Identify the labeled part in the given figure and select the correct option.
A
A – Heterocyst; B – Mucilaginous sheath
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B
A – Mucilaginous; B – Heterocyst
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C
A – Heterocyst; B – Capsid
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D
A – Pseudopoida; B – Mucilaginous sheath
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Solution
The correct option is A A – Heterocyst; B – Mucilaginous sheath The given figure shows the structure of Nostoc, a filamentous blue-green algae. The labeled part shows heterocyst and mucilaginous sheath as given below: