Marsupials used to have adaptations that allowed them to swim but lost these adaptations over time.
<h3>What is Adaptation?</h3>
The term adaptation has to do with those changes that allow an organism to effectively survive and reproduce in its habitat. They could by physiological or morphological changes.
The reason why the Marsupials are found in North america and australia is that, Marsupials used to have adaptations that allowed them to swim but lost these adaptations over time.
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Keystone species ; this is a species whose presence is critical to the composition and integrity of the community
In the given case, the person Chad is suffering from hepatitis.
Hepatitis refers to the inflammation of the liver. The viruses are the prime causes for the majority of hepatitis cases. The kind of hepatitis is named for the virus, which causes it, like hepatitis A, hepatitis B, or hepatitis C. Some of the common symptoms of hepatitis are:
1. Loss of appetite
2. Fatigue
3. Mild fever
4. Joint or muscle pain
5. Pain in the belly and nausea and vomiting
The probability that their next child will be normal is 1/4
