n : indusium is found in 1. algae 2. cycas 3. fronds 4. pteris
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Indusium is found in ferns .
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Answer:
The correct answer of this question is option 4,pteris.
Explanation:
We all know that membranes are biological protective layers of different internal biological organs.
Similarly, indusium is the membranous protective layer of the sorus portion of a fern.
And pteris is itself a type of fern.
That's why the correct answer of this question is option 4.
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