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Placental mammals live in almost every environment on Earth. They are one of the most successful groups in the animal kingdom. Mammals in general are very successful and the majority of mammals are placentals. This group is so successful because they are endothermic. The only mammals that are not placentals are the marsupials (kangaroo, opossum, etc) and the prototherians (egg laying mammals). Environments that do contain mammals would likely be constrained to those that are very severe: The deep ocean, extremely high mountain peaks, etc. Otherwise you can find these animals almost anywhere.
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What are the three kinds of mammals?
The Monotremes, Marsupials, and the largest group, Placental Mammals.Monotremes are mammals that lay eggs. The only monotremes that are alive today are the spiny anteater, or echidna, and the platypus.Marsupial's young are born in an extremely immature state; most female marsupials have pouches. Some marsupials include the koala, kangaroo, and the numbat.Placental Mammals are the most familiar group (meaning us), but also contains a diverse group of organisms from rats to dogs to horses.
When do placental mammals have their mating season?
It depends on the mammal. Rabbits, mice, rats and some other rodents and rodent-like animals breed whenever the opportunity arises. Other mammals may have their breeding season in Spring or Summer.
Mammals that retain their young within the body of the mother for a long period of time are called?
Placental mammals retain their young within the body of the mother for a long period of time. Humans, dogs, bears, and mice are all examples of placental mammals.Mammals which do not retain their young for a long period of time are marsupials, all of which have short gestation periods (e.g. kangaroos, koalas, Tasmanian devils, wombats, etc) and monotremes (platypuses and echidnas), which are egg-laying mammals.
What animal gives birth to young alive has hair and runs?
No. Most mammals give birth to live young, but the exceptions are the three species of monotremes - platypus, short-beaked echidna and long-beaked echidna. All species of bird lay eggs, rather than give birth to live young, and most amphibians, reptiles and fish also lay eggs. Some within each classification do bear live young.
Does a baboon have a pouch for its young?
No. Baboons are placental mammals, not marsupials.
Why do dolphins have bellybuttons?
Dolphins are placental mammals. All placental mammals have bellybuttons of some kind.
Why do cats have bellybuttons?
Cats are placental mammals, and all placental mammals have bellybuttons of some sort.
Do ponies have belly buttons?
Ponies, like all horses are placental mammals. ANd all placental mammals have bellybuttons of some sort.
Do placental mammals live mostly in new zealand and Australia?
No, placental mammals are not primarily found in New Zealand and Australia; they are widespread across various continents, including North America, Europe, Asia, and Africa. While Australia is known for its unique marsupials and monotremes, it does have some placental mammals, but they are not the dominant group. New Zealand, on the other hand, has a limited number of native mammals, most of which are bats. Overall, placental mammals are more diverse and prevalent in other regions of the world.
What are some animals with placentas?
Animals with placentas, known as placental mammals, include a wide variety of species such as humans, elephants, dogs, and whales. These animals give birth to live young that have developed inside the mother's uterus, receiving nutrients and oxygen through the placenta during gestation. Other examples include primates, rodents, and carnivores, showcasing the diversity of placental mammals in different environments.
Where do placental mammals live?
Placental mammals are mammals that give birth to fully developed live young, such as like humans, for instance. They are classed within the group of animals known as eutherians. Dogs, cats, livestock, rodents, giraffes, rhinoceroses, etc, are all placental mammals. This is opposed to the monotremes, which are egg-laying mammals (platypuses and echidnas) or marsupials (kangaroos, koalas, wombats, etc), which give birth to very undeveloped young that must complete their development attached to a nutrient-supplying teat, usually in the mother's pouch.
What vertebrate did not live during the time of the dinosaurs?
The modern-day mammal, specifically the placental mammals, did not live during the time of the dinosaurs. While some early mammals existed during the Mesozoic Era, they were small and not the diverse group we see today. The major diversification of placental mammals occurred after the dinosaurs went extinct around 66 million years ago. Thus, many of the mammals we are familiar with today emerged long after the age of dinosaurs had ended.
Are anteaters placental?
Yes. Anteaters are placental mammals because they do not have a pouch like most marsupials, and they do not lay eggs like the monotremes. The echidna, which is sometimes called the "spiny anteater", is not a true anteater. It is a monotreme, or egg-laying mammal.
What other subclasses are there for mammals?
Some other subclasses of mammals include monotremes, which are egg-laying mammals like the platypus and echidna, as well as marsupials, which carry their young in a pouch, like kangaroos and koalas. Additionally, there are also eutherians, which are placental mammals that nourish their young through a placenta, such as humans, dogs, and elephants.
Do mammals live in the desert?
Yes. Some mammals live in deserts.
Is a shark a placental mammal?
Yes, some sharks do have their young in this way, it is called viviparity. Some sharks maintain a placental link to the developing young which is similar to mammalian gestation. The young are born alive and fully functional. The hammerheads, the bull and the blue sharks are viviparous.
Is the little penguin a mammal?
No, a penguin is a flightless bird, while a marsupial is a mammal which rears its young in a pouch. Some penguins (such as the Emperor Penguin) have a skin flap which they incubate their egg in to stop it freezing but this doesn't make them mammals!
