The dioecious animal is (a) Liver fluke (b) Aurelia (c) Tapeworm (d) Earthworm
Hint: The animals in which male and female reproductive organs are present in separate individuals are called dioecious animals. A wide range of organisms in the animal kingdom is dioecious.
Complete answer: Aurelia is dioecious animals whereas liver fluke, tapeworm, earthworm are monoecious means male and female reproductive organs are present in the same individuals.
Additional information: Sexual reproduction refers to the fusion of a female gamete with a male gamete to produce a fertilized zygote which will develop into an individual similar to its parental organism. Depending on the gametes produced, various organisms are classified as monoecious and dioecious. - Monoecious: These organisms involve uniparental reproduction and exhibits self-fertilization - Dioecious: These organisms involve biparental reproduction. The eggs are produced by female parents and the sperms are produced by male parents. They commonly exhibit cross-fertilization. In some complex organisms that are highly evolved, a unique and rare phenomenon is observed which is neither monoecious or dioecious. This mode is termed as pseudohermaphroditism. It refers to a condition in which the individual is born with the primary sexual characteristics of one sex, but later develops the secondary sexual characteristics of a different gender.
So, the correct answer is ‘Aurelia’.
Note: - Monoecious: single - Dioecious: two - Monoecious animals are also called Hermaphrodites. - Studies are indicative of about 15% of animals, especially those that are sessile (nonmotile) or parasitic, are preferentially hermaphrodites.
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