The control group is the part of an experiment that does not receive the variable and is used for comparison.
A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.
The best and most correct answer among the choices provided by your question is the fourth choice or letter D. Reptiles are the most critically endangered animal group. Their population is threatened due to illegal activities done by man like poaching.
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I believe the correct answer from the choices listed above is the second option. The evidence that would be most useful for making this determination would be to u<span>se radiocarbon dating to determine the age of the rock underlying the ecosystem.</span>. Succession<span> is usually initiated by a significant disturbance of an existing community. Hope this answers the question.</span>
