Which term describes the stalk-like structure that supports the blades in some large seaweeds?

Which term describes the stalk-like structure that supports the blades in some large seaweeds?

• A. Thallus
• B. Valve
• C. Zooplankton
• D. Stipe

Answer: (D)

Stipe. In large seaweeds like kelp, the body is organized with a holdfast that anchors to the substrate, a stalk-like stipe that rises up, and leaf-like blades at the top that carry out photosynthesis. The stipe functions as the stalk that supports and positions the blades to maximize light capture while bending with currents for flexibility. The term thallus refers to the whole algal body, not just the stalk, and the other two terms come from entirely different organisms or structures.

Stipe. In large seaweeds like kelp, the body is organized with a holdfast that anchors to the substrate, a stalk-like stipe that rises up, and leaf-like blades at the top that carry out photosynthesis. The stipe functions as the stalk that supports and positions the blades to maximize light capture while bending with currents for flexibility. The term thallus refers to the whole algal body, not just the stalk, and the other two terms come from entirely different organisms or structures.