Question

Flagellated male gametes are present in all three of which one of the following sets?

• A. Riccia, Dryopteris and Cycas
• B. Zygnema, Saprolegnia and Hydrilla
• C. Fucus, Marsilea and Calotropis
• D. Anthoceros, Funaria and Spirogyra

Answer 1

The correct option is A

Riccia, Dryopteris and Cycas

The correct option is A.

Explanation for the correct option:

1. Gametes are reproductive cells present in an organism.
2. There are two types of gametes male and female gametes that when fused produce offspring.
3. Riccia is a bryophyte and is a genus of liverworts, it has biflagellated male gametes.
4. Dryopteris or wood fern or male fern is a perennial herb.
5. Dryopteris is a pteridophyte have a multiflagellate male gametophyte.
6. Cycas have multiciliated male gametes and belong to gymnosperms.
7. The male gametes in Cycas are top-shaped, equal, spirally coiled, and largest.

Explanation for Incorrect options:

Option B:

1. Zygnema is a freshwater thalloid green alga and is filamentous active male gametes.
2. Saprolegnia has biflagellated male gametes, it is a freshwater fish pathogen.
3. Hydrilla, a hydrophytic angiosperm that lacks male gametes is a perennial herb.

Option C:

1. Fucus is a brown alga and is a biflagellate male gamete.
2. Marsilea is an aquatic fern have motile and ciliated male gametes.
3. Calotropis is from the family Apocynaceae and has immobile male gametes.

Option D:

1. Anthoceros is also known as field hornwort, it is a small rosette plant, that has a biflagellate male gamete.
2. Funaria is a bonfire moss and has a biflagellate gamete.
3. Spirogyra is a freshwater green alga that has non-flagellated gametes and shows amoeboid movement.

Final answer: Flagellated male gametes are present in all three Riccia, Dryopteris, and Cycas.