chemistry of the nitrogenous bases are really the key to function the DNA<span>. something called complementary base pairing. cytosine can forms three hydrogen </span>bonds<span> with guanine, and </span>adenine<span> can form two hydrogen </span>bonds<span> with thymine.</span>
<span>There might have been a change in the climate of a region, and the plants or animals could have died out because of the change in the weather. Or one animals might have been destroyed by another that was stronger or more adapted.</span>
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It is crucial to be aware of and respect the environment because you live off of it. Our earth provides us air, energy, food, and the resources we need to live. When we don't keep our environment clean, and disrespect it, it won't be in as good condition as it should be, and could potentially die out from being mistreated. We need to be aware of our environment to know what we need to do to cater to its needs, so it can cater to ours.
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The blood type matching is a way too broad way to prosecute a suspect since there are about 8 universal blood groups in total. I would demand a DNA test.
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