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How do marsupials differ from all other mammals with respect to carrying unborn young?
Wiki User
∙ 10y ago
With regard to carrying unborn young, marsupials have a very short gestation period compared to that of placental mammals of similar size. For example, a quoll has a gestation period of 21 days. It is often compared in size to a cat, which has a gestation period of 63-65 days. A wallaby's gestation period averages 30 days; a similar-sized dog has a gestation period of up to 65 days, depending on the breed.
The shorter gestation period of marsupials is because they have a yolk-like placenta by which to nourish the young. By contrast, the placenta of placental mammals, or eutherians, nourishes the developing embryo using the mother's blood supply. This allows for longer gestation time.
Wiki User
∙ 10y ago
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How marsupials differ from all other mammals?
Marsupials give birth to very tiny young and nourish them in the pouch until they can survive on their own.
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.
How does the European fox differ to Australian animals?
The European fox is introduced. Most Australian mammals are marsupials and the fox is an introduced placental mammals which is a considerable threat to Australia's native wildlife.
What are mammals differ from birds?
Mammals differ from birds as birds lay eggs, and mammals give live birth.
What makes a koala different to other mammals?
They are nocturnal.Almost all marsupials are nocturnal.Koalas are different from many other marsupials because they are one of the few marsupials which have backward-facing pouches.Something which makes the koala completely unique is the fact that the mother produces a substance called pap for their joeys to prepare them for a life of eating eucalyptus leaves.Baby koalas, called joeys, drink mother's milk during their first 6-7 months of life. After 30 weeks, the mother produces a substance called pap. This substance is actually a specialised form of the mother's droppings which, having passed through her digestive system, give the joey the enzymes it needs to be able to start digesting the tough gum leaves, making an easier transition for the baby koala to start eating eucalyptus leaves.
How do placental monotremes and marsuprials differ?
Placental mammals give birth to live young, which, during development, are nourished by a placenta. Marsupials give birth to very tiny, undeveloped offspring, which they then shelter in a pouch until the baby has developed more fully. Monotremes are mammals that lay eggs, and the only existing types are the platypus and the echidna.
How do the lungs of bird differ from lungs of mammals?
smaller
How do calories in drinks differ from food calories?
AnswerThey are the same. Food and drink do not differ in this respect.
Is it true that birds are similar to mammals?
Yes, in some ways birds are very similar to mammals. In others, they differ completely.
How are mammals different to one other?
how do animal differ from onr other
How are isotopes alike?
Isotopes are exactly same with respect to all the chemical properties but they differ with respect to physical properties.
How does a mammal differ from a reptile?
Reptiles are cold blooded but mammals are warm blooded
