Strenuous muscular is just a fancy way to say exercise. As the muscles are used more often the need more oxygen, so that is why your breathing rate increases while doing "exercise".
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they are organisms that obtain energy by the oxidation of electron donors in their environment
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Answer: C) variable base sequences and are variable in the population.
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Single nucleotide polymorphisms (SNPs) result from mutations point and correspond to the position where there is an alternation of nucleotides A, C, G, T at a minimum allele frequency of 1% in a given population. The SNPs may be present in both coding and non-coding regions of the genome. In coding regions, when resulting in an amino acid substitution, they are called synonyms and can be conservative or non-conservative depending on the characteristics of the amino acids involved in the exchange. In such cases, modifications may occur in structural and functional proteins.
