Answer: Bipolar disorder
Explanation: Taking into consideration the symptoms described, Calvin would most likely be diagnosed with bipolar disorder. This disorder is one of the "mood disorders" where a person experiments both spectrums of depression and mania, meaning that it goes from feeling the worst to being the best among other things.
Impulsivity, irritability and perception distortion are other common symptoms presented in bipolar patients.
The result of the isolation of the Australian continent for millions of years was because the continent has no fossil record of species evolution.
The supercontinent Pangaea was believed to exist in early times and incorporated all the landmasses on Earth
- The theory of continental drift explains that plate whichs forms the lithosphere of continent continue to move and has been in process for million of years ago
- The theory of continental drift does applies to Australia continent as well because it is believed the continent moves away and isolates from the supercontinent Pangaea
Hence, the Option A is correct because the result of the isolation of the Australian continent for millions of years was because the continent has no fossil record of species evolution.
Read more about continental drift
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The Appalachian Mountains rise to heights of about 3,000 feet.