Assertion: algae | /r/MadeOf | root and air sac structures
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Source sentences:
text: multi-cellular, live in deep salt water; in uncontrolled spurts, this algae has been responsible for ecological damages Brown Algae – type of seaweed with large leafs called “blades," contain root and air sac structures; thrive in salt water; can grow to heights in excess of 100 feet; appear most plant-like of the algae