I got C. it is a homogenous mixture and particles settle down if left undisturbed.
Changing environments and ecosystems were driving the evolution of horses over the past 20 million years. ... "According to the classic view, horses would have evolved faster in when grasslands appeared, developing teeth that were more resistant to the stronger wear that comes with a grass-dominated diet
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The answer is A. Melting and Cooling.
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idont really know but it looks like k
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Passive transport must occur to maintain homeostasis. Active transport must occur to get the needed nutrients in and out of the cell.
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