Question

6) How are brown algae attached to the substratum?​

Answer 1

Answer:

Holdfast is a rootlike or flagella like structure that is present in algae or some other plants which helps them in their attachment with substratum. Holdfast can either be rhizodial or normal type.

Explanation:

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Answer 2

holdfast is like a root like structure that is present in Algae that helps it to attach to the substratum