Question

Which of the following groups of algae, belongs to class Rhodophyceae?

• A. Laminaria, Fucus, Porphyra, Volvox
• B. Gelidium, Porphyra, Dictyota, Fucus
• C. Gracilaria, Gelidium, Porphyra, Polysiphonia
• D. Volvox, Spirogyra, Ulothrix, Sargassum
• E. Sargassum, Laminaria, Fucus, Dictyota

Answer 1

The correct option is C Gracilaria, Gelidium, Porphyra, Polysiphonia

• The members of Rhodophyceae are commonly called red algae because of

the predominance of the red pigment, r-phycoerythrin in their body.

• The common members are Polysiphonia, Porphyra, Gracilaria, and Gelidium.
• While Laminaria, Fucus, Dictyota and Sargassum are brown algae.
• Volvox, Spirogyra and Ulothrix are green algae.
• So, the correct answer is "Gracilaria, Gelidium, Porphyra, Polysiphonia'.