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What else can I help you with?
Do monotremes have short internal development?
No, monotremes do not have short internal development.
Is a feline mammal the same as a placental mammal?
Yes and No. Felines are animals closely related to cats (technically excluding the "great cats" ... lions, tigers, etc. ... who are felids but not felines). Placental mammals are those whose gestation includes a placenta (basically, all mammals except the monotremes and marsupials).All felines are placental mammals, but not all placental mammals are felines. Humans, for instance, are also placental mammals.Placental mammals bear live young, (that includes cats) that are nourished in the mother's uterus through the embryonic organ (placenta) attached to the uterus wall. The term "placental mammals" is somewhat misleading because marsupials also have placentae but it is short lived in its part for fetal nourishment. In eutherians, as "placental mammals" are known scientifically depend on the placenta during the full developmental stage of the fetus.
Is a dingo a monotreme?
No. Dingoes are placental mammals. There are just three species of monotreme: the platypus, the short-beaked echidna and the long-beaked echidna.
What can you infer based on the preceding information about how marsupials differ from placental mammals?
Thier gestation periods are diffrent. Marsupials have a short gestation date while mammels are normally long.
Does a zebra lay eggs?
No. Zebras do not lay eggs. There are only three egg-laying species of mammal the platypus, the long-beaked echidna and the short-beaked echidna. These egg-laying mammals are known as monotremes. Zebras are not monotremes, but placental mammals, or eutherians.
Do hippotomuses lay eggs?
No. Hippopotamuses do not lay eggs. There are only three egg-laying species of mammal the platypus, the long-beaked echidna and the short-beaked echidna. These egg-laying mammals are known as monotremes. Hippopotamuses are not monotremes, but placental mammals, or eutherians.
Why is a marsupial's gestation period so short?
The gestation period of marsupials is shorter than placental mammals of the same size because the young joeys, while in the uterus, have only a yolk-like placenta to sustain them for a short period of time. They are born, then make their way to the mother's teats, which are usually located within a pouch. There, they attach to a teat which swells in the joey's mouth and provides all the nutrition the joey needs to continue its development. The reason why these animals have such a short gestation period is because the pouch protects them, while the mothers' milk, supplied through the teat to which the joeys remain attached for several months, nurtures them much as the placenta does in placental mammals.
Do springboks lay eggs?
No. Springboks do not lay eggs. There are only three egg-laying species of mammal the platypus, the long-beaked echidna and the short-beaked echidna. These egg-laying mammals are known as monotremes. Springboks are not monotremes, but placental mammals, or eutherians.
Not all mammals give birth to their young. Why?
Quite simply, there are three species of mammals which lay eggs rather than giving birth to live young. These are the platypus, the short-beaked achidna and the long-beaked echidna. These mammals are still classified as mammals because they have fur, breathe using lungs and feed their young on mothers' milk. The last characteristic is the defining characteristic of all mammals, regardless of whether they are placental mammals, marsupials or monotremes (egg-laying mammals).
Why do kangaroos have short gestation periods?
The young baby kangaroo (joey) is born in a very immature state, but moves into the mother's pouch and attaches to a nipple to continue it's development. A human baby is born in a more mature state.
Are there porcupines in Australia?
No. Porcupines are not found in Australia. Australia has no placental mammals even similar to the porcupine. The closest animal in appearance is the short-beaked echidna, but the echidna is not even remotely related to the porcupine as it is a monotreme, or egg-laying mammal.
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.
