Algal Reproduction: Vegetative to Sexual — NEET Biology
📚 Practice ConceptThe algae reproduce by vegetative, asexual and sexual methods. Vegetative reproduction is by fragmentation. Each fragment develops into a thallus. Asexual reproduction is by the production of different types of spores, the most common being the zoospores. They are flagellated (motile) and on germination gives rise to new plants. Sexual reproduction takes place through fusion of two gametes. These gametes can be flagellated and similar in size (as in Ulothrix) or non-flagellated (non-motile) but similar in size (as in Spirogyra). Such reproduction is called isogamous. Fusion of two gametes dissimilar in size, as in species of Eudorina is termed as anisogamous. Fusion between one large, non-motile (static) female gamete and a smaller, motile male gamete is termed oogamous, e.g., Volvox, Fucus.
Which of the above statements are correct? S1: Fragmentation is a vegetative reproductive method in algae, where each fragment can develop into a new thallus. S2: Asexual reproduction in algae commonly involves the production of flagellated zoospores. S3: Isogamous sexual reproduction in algae is characterized by the fusion of gametes that are dissimilar in size, as seen in Volvox. S4: Oogamous reproduction typically involves the fusion of a large, non-motile female gamete and a smaller, motile male gamete. S5: All forms of sexual reproduction in algae require flagellated gametes for fusion.
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