Question

4.
a) Algae are found in clumps called​

Answer 1

Answer:

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Filamentous also known as "pond moss" or "pond scum" these threadlike algae often occur in huge greenish masses floating upon the waters' surface. They can form dense mats in static water or long, rope-like strands in flowing water.

Explanation:

Answer 2

Answer:

Filamentous or pond mass