Question

Which type of sexual reproduction is found in volvox?
A. Isogamous
B. Anisogamous
C. Oogamous
D. All of these

Answer 1

Hint: Volvox can reproduce both sexually and asexually, in sexual reproduction there are two sorts of gametes produced and the gametes may be monoecious or dioecious. Monoicous are those species that bear both sperm and eggs on an equivalent gametophyte. Dioicous are those species that have gametophytes that produce only sperm or eggs but never both.

Complete Answer:
- In Isogamous mode of sexual reproduction, the structure, morphology and activity of the fusing gametes remains the same and it is not easy to differentiate which gamete is male and which female.
- In Anisogamous mode of sexual reproduction, the gametes fusing are dissimilar, however sometimes the morphology might be the same.
- In oogamous mode of sexual reproduction, the male gamete are smaller in size and produced more in number compared to female gamete, whereas the female gamete is larger in size.
- Volvox is a genus of green algae in the family Volvocaceae. They usually live in a variety of freshwater habitats and it grows on the surface of water bodies and during rainy seasons, they grow fast making the surface to appear in green color. They reproduce both sexually and asexually, in sexual reproduction two types of gametes are produced.
- Volvox species can be monoecious or dioecious. Male colonies produce numerous sperm packets during reproduction, while in female colonies single cells enlarge to become oogametes, or eggs. Volvox is facultatively sexual and the sexual reproduction type is Oogamous type.

So from the above discussion it is concluded that the right answer will be C as Volvox sexual reproduction is Oogamous type.

Note: Oogamous is a sort of sexual reproduction during which the feminine gamete is significantly larger than the male gamete and is non-motile. The male gametes are typically highly motile and are usually tasked with all of the travel necessary to bring the respective gametes together. It predominantly occurs in animals, but also can be found in many protists, certain orders of algae and a few plants like bryophytes, ferns, and a few gymnosperms like cycads and ginkgo.