What are examples of placental mammals?

Answer 1

Egg laying animals such as birds, frogs, fishes, chickens, perry the platypus (agent p), crocodiles, alligators, snakes, salamander, lizards, turtles, siren, mud puppy, hell banders, and caecillians

Answer 2

Examples of placental mammals are

• dogs and other canines
• cats and other felines
• whales, dolphins and other marine mammals
• humans
• bats
• primates such as chimpanzees, monkeys, gorillas
• livestock such as pigs, horses, cattle, sheep, goats
• all rodents such as rats, mice, chipmunks and guinea-pigs
• giraffes
• rhinoceroses
• hippopotamuses

Not all mammals are placental.

The term "placental mammals" refers to those mammals which give live birth to fully developed young. these young have been nourished via the placenta, usually for several weeks to several months or longer, depending upon the size of the mammal.

Placental mammals may be distinguished from marsupials by the fact that marsupials are born extremely undeveloped. The blind, hairless, bean-sized joey makes an arduous journey into the mother's pouch (although not all marsupials have pouches) where it latches on to a teat. The teat then swells in its mouth, securing it firmly in place, while it continues its development for several more months.

The third group of mammals are the egg-laying mammals, the monotremes. These include platypuses and echidnas.

Answer 3

Oviparous animals lay eggs: birds, a large number of reptiles, fish and amphibians.

Viviparous animals bare live young that have developed in a womb or internally in another internal organ system (all mammals except monotremes, some reptiles, fish and amphibians, etc.).

Answer 4

All mammals except for monotremes are viviparous. Monotremes are platypuses and echidnas: therefore, any mammal that is not a platypus or echidna is viviparous.

Actual examples would be cats, dogs, horses, kangaroos, koalas, gerbils, gophers, beavers, dolphins, whales, rats, shrews, porcupines, armadillos, etc.

Answer 5

A viviparous animal carrys the embryo inside the mother and the mother gives birth to live young. Like cows and horses.

Answer 6

Ovoviviparous animals are animals that develop within eggs. The eggs stay in the mother's body until it is time to hatch. Examples include reptiles, fish and sharks.

Answer 7

All mammals except the echidna and platypus are viviparous.