Question

The plant body having holdfast, stipe and frond is a characteristic of

• A. Laminaria
• B. Volvox
• C. Gelidium
• D. Porphyra

Answer 1

The Correct Option is A

The given question asks about the plant body structure and relates it to specific organisms. The options provided include different types of algae. Let's examine each option:

1. Laminaria: It is a type of brown algae belonging to the group Phaeophyceae. Laminaria has a distinctive structure comprising three main parts: the holdfast, stipe, and frond.
   • Holdfast: This functions like roots, anchoring the algae to the substrate.
   • Stipe: This is the stalk or stem-like part connecting the holdfast to the frond.
   • Frond: This leaf-like structure is where photosynthesis primarily occurs.

   This structure is characteristic of Laminaria, making it the correct answer.

2. Volvox: This is a genus of green algae forming spherical colonies. It doesn't have a holdfast, stipe, or frond structure. Instead, it consists of numerous flagellated cells embedded in a gelatinous matrix forming a hollow sphere.
3. Gelidium: This red alga is part of the Rhodophyta group. It doesn't have a holdfast, stipe, and frond; instead, it has a thallus that is more bladelike or leafy.
4. Porphyra: Another red algae, commonly known as nori, Porphyra has a thallus that is thin and sheet-like. It isn't structured with a holdfast, stipe, and frond.

Based on this analysis, the organism with the plant body structure of holdfast, stipe, and frond is Laminaria, which corresponds to the correct answer choice.