Question

Pyriform gametes with two laterally attached flagella are found in

• A. Laminaria and Fucus
• B. Sargassum and Volvox
• C. Ectocarpus and Chara
• D. Fucus and Fumaria

Hint:

In algae, pyriform gametes are characteristic of some brown algae such as Laminaria and Fucus, which have two flagella attached laterally. Remember that the shape and structure of gametes can help in identifying the species.

Answer 1

The Correct Option is A

Pyriform gametes are a type of flagellated gametes with a pear-like shape. The key characteristic is that the flagella are attached laterally to the body of the gamete.

• Laminaria and Fucus: These are both marine algae in the class Phaeophyceae (brown algae). They produce pyriform gametes, which have two flagella attached laterally.
• Sargassum and Volvox: Both produce flagellated gametes, but they do not produce pyriform gametes with two laterally attached flagella. Sargassum produces ovoid-shaped gametes.
• Ectocarpus and Chara: These algae also produce flagellated gametes, but Ectocarpus produces isogametes and Chara produces non-pyriform gametes.
• Fucus and Fumaria: Fumaria is a flowering plant, not an algae. Hence, the pairing is incorrect.

Therefore, the correct answer is: (1) Laminaria and Fucus.