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Earth has various layers: the covering, the mantle, the fluid outer core and the inner core.
The Earth's attractive field controls the course and speed at which Earth's internal and external centers turn, despite the fact that they move in inverse ways, new research proposes.
The principal components of the plasma membrane are lipids (phospholipid and cholesterol) , proteins , and carbohydrates groups that are attached to some of The lipids are proteins.
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The best answer to the question states above is letter C.<span> A short observation period.
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<span> A scientist's primary concern in a clinical trial is the patient's safety, there fore short observation </span><span>decreases the reliability of results from a clinical trial</span>