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  1. They have hair or fur.
  2. They give live birth
  3. They are warm-blooded
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11y ago

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What are the three main groups of mammals?

Monotremes, marsupials, and placental mammals.


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The three types of mammals are:Placental mammals, or Eutherians. This is the largest group of mammals.Marsupials (often referred to as the "pouched mammals")Monotremes, or egg-laying mammals


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Mammals are warm-blooded vertebrates.They have a covering of skin or hair/fur.All mammals suckle their young with mothers' milk.The young of most mammals are born alive, except for monotremes - the platypus and echidna - which lay eggs.There are three main groups of mammals: placental, marsupial and monotreme. Monotremes are the egg-laying mammals. Marsupials are characterised by giving birth to undeveloped young which, in most species, must then develop in a pouch.


What is cougars main source of energy?

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Do frogs have a three-chambered heart?

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What are three mammals found in Africa?

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Which is the difference between the three mammal groups?

The three main groups of mammals are monotremes, marsupials, and placental mammals. Monotremes, like the platypus, lay eggs and produce milk but lack nipples. Marsupials, such as kangaroos, give birth to underdeveloped young that continue to develop in a pouch. In contrast, placental mammals, including humans, have a complex placenta that nourishes the developing fetus during a longer gestation period inside the womb.