C. Base
In DNA there are 4( sometimes 5) types of bases: adenine, guanine, thymine. They are the BASES
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Rough and smooth ER is the two kinds
The answer is the first one The Earth rotates on its axis over 24hrs.
Chemical<span> Mixtures. A mixture is a material system made up of two or more different</span>substances<span>, which are mixed </span>but not combined chemically<span>. A mixture refers to the physical </span>combination<span> of two or more </span>substances<span> in which the identities of the individual </span>substances<span> are retained.</span>