Question

what do you mean by ViViPars animal​

Answer 1

Answer:

Viviparous animals give birth to the young ones directly without producing eggs

Example :- Humans

Answer 2

Required Answer :

• Among animals, viviparity is development of the embryo inside the body of the parent.
• This is opposed to oviparity which is a reproductive mode in which females lay developing eggs that complete their development and hatch externally from the mother.
• An aphid giving viviparous birth, an unusual mode of reproduction among insects
• The term 'viviparity' and its adjective form 'viviparous' derive from the Latin vivus meaning "living" and pario meaning "give birth to".

Now lets learn About their Reproductive Mode:

Five modes of reproduction have been differentiated in animals based on relations between zygote and parents. The five include two nonviviparous modes: ovuliparity, with external fertilisation, and oviparity, with internal fertilisation. In the latter, the female lays zygotes as eggs with a large yolk; this occurs in all birds, most reptiles, and some fishes.These modes are distinguished from viviparity, which covers all the modes that result in live birth:

• Histotrophic viviparity: the zygotes develop in the female's oviducts, but find their nutriments by oophagy or adelphophagy (intra-uterine cannibalism of eggs or sibling embryos in some sharks or in the black salamander Salamandra atra).

• Hemotrophic viviparity: nutrients are provided by the female, often through some form of placenta. In the frog Gastrotheca ovifera, embryos are fed by the mother through specialized gills. The skink Pseudemoia entrecasteauxii and most mammals exhibit a hemotrophic viviparity.

• Placental viviparity is arguably the most highly developed form of viviparity. Placental mammals, including humans, are the best-known example, but adaptations in some other animals also have incorporated this principle or close analogies. Other examples include some species of scorpions and cockroaches, certain genera of sharks and snakes, and velvet worms.

• Ovoviviparity, a less developed form of viviparity, occurs in most vipers, and in most live-bearing bony fishes (Poeciliidae). However, the term is poorly and inconsistently defined, and may be obsolete. This term has been redefined and more commonly referred to as oviparous egg retention or prolonged egg retention.

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