Mammals are a diverse group of animals characterized by several distinct features. Here are four key features of mammals:
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Hair or Fur: Mammals have hair or fur at some stage of their life cycle, which provides insulation and helps regulate body temperature.
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Mammary Glands: Female mammals possess mammary glands that produce milk to nourish their young, which is a defining characteristic of the group.
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Three Middle Ear Bones: Mammals have three bones in the middle ear (the malleus, incus, and stapes) that are involved in hearing, allowing for better sound transmission.
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Warm-Blooded (Endothermic): Mammals are warm-blooded, meaning they can regulate their body temperature internally, maintaining a relatively constant temperature regardless of the environment.
These features contribute to the unique biological and ecological roles that mammals play in various ecosystems.