Final answer:
Parthenogenesis is a form of asexual reproduction that occurs in certain groups of animals, such as insects, reptiles, amphibians, and fish. Birds also use parthenogenesis when isolated from males.
Step-by-step explanation:
Parthenogenesis is a form of asexual reproduction in which an egg develops into an individual without being fertilized. This process occurs in certain groups of animals, such as insects, certain reptiles, amphibians, and fish. While it is more common in plants, parthenogenesis has been observed in vertebrate species that were segregated by sex in zoos. For example, birds use parthenogenesis when isolated from males.