What is the buoyant organ found in some large brown algae that helps maintain vertical position?

Study for the IB Marine Science Standard Level Exam. Prepare with interactive quizzes and in-depth explanations. Use our resources to excel in your marine science knowledge!

Multiple Choice

What is the buoyant organ found in some large brown algae that helps maintain vertical position?

In large brown algae, buoyancy is provided by gas-filled structures called pneumatocysts, or gas bladders. These sacs trap air, lowering the overall density so the blades stay near the water’s surface where light is abundant for photosynthesis. The holdfast simply anchors the alga to the substrate and doesn’t contribute to buoyancy. A frustule is the silica shell of a diatom, not a buoyant feature of brown algae, and the microbial loop refers to nutrient cycling in the microbial community, not a physical organ of macroalgae.

What is the buoyant organ found in some large brown algae that helps maintain vertical position?

Study for the IB Marine Science Standard Level Exam. Prepare with interactive quizzes and in-depth explanations. Use our resources to excel in your marine science knowledge!

What is the buoyant organ found in some large brown algae that helps maintain vertical position?

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