Question

What are the unisexual organisms?

Answer 1

Hint: Unisexual organisms are a condition of an organism where it represents only single-sex and produce only single-sex gametes. It's a condition similar to the Dioecism condition in plants.

Complete step-by-step solution:
Unisexual organisms are found in bisexual species, where an individual has only one type of sex (either male or female) cells and can produce only that sex gonads. Unisexual organism can only form a single type of sex gametes but never can produce both the sex gametes. For example Human beings, birds, fish, reptiles, etc.

Additional Information:
1. A bisexual species are the species with separate male and female individuals that have to mate in order to undergo fertilization and produce off-springs.
2. A unisexual species are the species having all individuals of same-sex. For example, some species of Whiptail wizards are only female individuals. They undergo parthenogenesis to produce off-springs from eggs.
3. Unisexuality has an advantage over bisexual organisms in that there are more chances of variation helping in natural selection.
4. In the case of the advantages of bisexual organisms over the unisexual organism is rapid reproduction, as they don’t have to wait for compatibility for the fusion of male and female gametes and some undergo parthenogenesis (production of off-springs without fertilization).

Note: Bisexual species differ from bisexual organisms, as bisexual species refer to organisms with two different sex individuals, for example, birds and human beings. Whereas, bisexual organisms refer to an individual having both male and female characters like the reproductive system of both sexes, and they produce both sex (male and female) gonads and gametes, for example, earthworm, leech, etc. On the other hand, there is no difference between unisexual species or organisms as both refer to individuals with features of only one sex.