Oviparity

Definition

Oviparity is a mode of reproduction in which animals lay eggs that develop and hatch outside the mother's body. It is common in many species of fish, amphibians, reptiles, birds, and some mammals.

5 Must Know Facts For Your Next Test

1. Oviparous animals provide little to no parental care after laying eggs.
2. Eggs laid by oviparous animals contain all necessary nutrients for embryo development.
3. Environmental factors such as temperature and humidity can influence the success of egg development in oviparous species.
4. Birds are one of the most well-known groups of oviparous animals, with many species building nests to protect their eggs.
5. Certain oviparous reptiles like turtles bury their eggs underground to incubate them using natural heat sources.

Review Questions

• What are the primary differences between oviparity and viviparity?
• How do environmental conditions affect the development of eggs in oviparous animals?
• Can you name three examples of oviparous species from different animal classes?

Related terms

Viviparity: A mode of reproduction where embryos develop inside the mother's body and are born live.

Ovoviviparity: A reproductive method where eggs develop inside the mother's body but hatch either within or immediately after being released from her.

Embryo:

An early stage of development in multicellular organisms following fertilization and before becoming a fetus or hatching from an egg.