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I'm presuming you mean the three different subcatagories or taxa as there around 25/26 mammalian orders. The three taxa are - Prototheria or Monotreme = Mammals that lay eggs Metatheria Marsupial = Mammals with external development pouches.
Explanation:
Answer:
The survival and reproductive success of an individual is directly related to the ways it's inherited traits function in the context of its local environment
Hope this helps
Brains of alzheimer victims display plaque, which are BETA AMYLOID PROTEIN and tangles, which are TAU PROTEIN. Alzheimer is a neuro-degenerative disease in which brain cells are progressively destroyed, leading to memory loss and dementia.
Molten Lava, and not solid like the crust.
Classifying Fingerprints. Once the fingerprints are taken and labeled, forensic scientists use a classification system to identify them. The three basic fingerprint patterns are Whorl, Arch, and Loop. There are more complex classification systems that further break down the pattern to plain arches or tented arches. Hope this helps