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16 Ιαν 2016 · Many animal groups have some species that lay eggs and others that birth live young, including fish, amphibians, and yes, even mammals, says Whit Gibbons, evolutionary biologist at the University...
Many animals give birth to live young like people do, this is referred to as viviparity. More specifically it’s when animals develop young in a womb, with a placenta. In this article we’re going to look at 15 examples of viviparous animals and learn a little bit about them.
Mammals are hairy, produce milk, are warm-blooded, and give birth to live young…except for two animals. That’s right. There is a group of mammals, called monotremes, that lays eggs instead of giving birth to live young.
18 Μαΐ 2020 · Over millennia of evolution, nature has come up with only two ways for a newborn animal to come into the world. Either its mother lays it in an egg, where it can continue to grow before hatching, or it stays inside its mother until emerging as a more fully formed squirming newborn.
Animals that lay eggs are called oviparous. In this case, the eggs’ fertilization and development don’t occur within the female’s body, and the eggs hatch outside. In the case of viviparous reproduction, the embryo develops in the mother’s body resulting in the birth of live young.
Unlike oviparity, where animals lay eggs, viviparous animals give birth to live young after the embryos develop inside a womb with the help of a placenta. This article explores the definition, classification, examples, unique characteristics and behaviors, evolutionary aspects, mating and fertilization, prenatal development, labor and birth, as ...
8 Ιουν 2020 · This frog’s babies erupt out of its back—and other surprising ways animals give birth. Mammals aren't alone—some reptiles, amphibians, and insects give birth to live young.
