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The answer is D.both B and C .
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Answer:
A. because immune, nervous, and muscle system cells require proteins for structure and regulation.
Point-source pollution is easy to identify. As the name suggests, it comes from a single place
Answer:
Explanation:
<em>Each trait of an organism is determined by discrete units called genes and individuals carry two alleles for each gene. (Mendel didn't actually discover genes though). Each gamete of an individual carries only one allele of each gene (this is Mendel's Law of Segregation).</em>
