Difference Between Viviparous and Oviparous
Introduction
Viviparous and oviparous are two terms that describe different methods of reproduction in animals. Viviparous animals give birth to live young, while oviparous animals lay eggs. In this article, we will discuss the differences between these two methods of reproduction.
Viviparous
Viviparous animals are those that give birth to live young. In this method of reproduction, the embryo develops inside the mother, and the young are nourished through the placenta. Mammals, including humans, are viviparous. Other examples of viviparous animals include sharks, snakes, and some lizards.
Oviparous
Oviparous animals are those that lay eggs. In this method of reproduction, the embryo develops outside the mother’s body, typically in a protective shell. The young then hatch from the egg when they are fully developed. Examples of oviparous animals include birds, reptiles, and amphibians.
Differences
The main difference between viviparous and oviparous animals is the way their offspring are born. Viviparous animals give birth to live young, while oviparous animals lay eggs. Another difference is in the way the young are nourished. Viviparous animals nourish their young through the placenta, while oviparous animals provide nourishment through the yolk of the egg.
Conclusion
Viviparous and oviparous are two different methods of animal reproduction. In viviparous animals, offspring are born live and are nourished through the placenta. In oviparous animals, offspring are hatched from eggs and are nourished through the yolk. Understanding the difference between these two methods of reproduction is important for understanding the diversity of life on Earth.
Table difference between viviparous and oviparous
| Characteristic | Viviparous | Oviparous |
|---|---|---|
| Offspring Development | Embryos develop inside the mother’s body and are born alive | Embryos develop in eggs laid outside of the mother’s body and hatch |
| Types of Animals | Mammals, some fish, and some reptiles | Birds, most reptiles, and some fish and invertebrates |
| Method of Reproduction | Internal fertilization | External fertilization |
| Pregnancy | Mothers provide nutrition and protection for developing offspring | Eggs contain yolk which provides nutrition for developing embryo |
| Survival Rate of Offspring | Higher due to maternal care and protection | Lower due to vulnerability to predators and environmental factors |