Question

Which group of algae reproduce by oogamous sexual reproduction?

Answer 1

Hint: Oogamy is defined as the process of sexual reproduction in which the female gamete is larger than the male gamete which is motile in nature. It commonly occurs in the animals. In this the female gamete is non motile and the male gamete is motile in nature.

Complete answer:
Oogamy is considered as an advanced form of anisogamy as the third phase of development of the sexual process. Oogamy is found in higher gatherings of algae like Volvox, Ochrophyta, Charophyceans and Oedogonium. Oogamy prevalently happens in animals, however can likewise be found in numerous protists and a few plants. For example, bryophytes, ferns, and a few gymnosperms like cycads and ginkgo.

In some algae, most gymnosperms and all angiosperms, a variety of oogamy happens where the sperm cells are non-motile also. Apparently isogamy was the main phase of sexual reproduction. After days gone, this type of proliferation freely developed to anisogamy with gametes of male and female sorts to oogamy. Humans are also the example for the oogamy. In humans the sperms are flagellated and motive and are much smaller than the female egg which is non-motile in nature.

Note: Anisogamy is similar to oogamy. In anisogamy, the reproduction takes place between the male and the female gametes of different sizes. Oogamy takes place between the gametes in which the female gamete is slightly larger than the male. Isogamy is defined as the reproduction between the gametes of the similar sizes.