Answer:
Phrenology is considered a pseudoscience because of its lack of scientific support for the claim.
Explanation: The theory has contributed to medicine because of its basic premise is that mental functions are localized in areas of the brain.
The answer is : Thermosphere. At this point the homosphere (troposphere, stratosphere and mesosphere) ends at about 80 km from the surface, gas molecules<span> are here</span>bombarded<span> by X-</span>rays from the sun<span> and subsequently form the ionosphere.
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<u>changes </u><u>in </u><u>abiotic </u><u>factors</u> is the most appropriate answer for this question.
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(by Benjemin)
Arthropods has the bilateral symmetry !
so answer is B !