Astronomers define star<span> brightness in terms of apparent </span>magnitude<span> (how bright the </span>star<span> appears from Earth) and </span>absolute magnitude<span> (how bright the </span>star<span>appears at a standard distance of 32.6 light years, or 10 parsecs).</span>
Answer:
this helps us to categorize organisms so we can more easily communicate biological information.
Answer: Geologic time is divided into units. Major changes in the earth's surface or climate and the extinction of species help to divide the time scale into smaller units.
Explanation: Rocks grouped within each unit contain a similar fossil record.
Mitochondria. The “powerhouses” of the cell, mitochondria are oval-shaped organelles found in most eukaryotic cells. As the site of cellular respiration, mitochondria serve to transform molecules such as glucose into an energy molecule known as ATP (adenosine triphosphate).
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