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Explanation:
A star of one solar mass remains in main sequence for about 10 billion years, until all of the hydrogen has fused to form helium.
It is called the esophagus
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Answer:
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The investigators could distinguish human hair from animal hair by the patter of pigmentation and by the medullary index.
The pigmentation in human hairs is denser toward the cuticle, whereas in animal hair is denser toward the medulla. Human hairs are usually one colour throughout the whole length, while animal hairs may change colour suddenly.
The medulla in humans is thinner than in animals: the medullary index for human hairs is 0.33 or less; the medullary index for animal hairs is 0.5 or more.
The lack of iron makes them crave ice.