I'm not entirely sure, but I think it is B) the pulley.
A macromolecule is a very large molecule, such as protein, commonly created by polymerization of smaller subunits (monomers). They are typically composed of thousands of atoms or more. The most common macromolecules in biochemistry are biopolymers and large non-polymeric molecules. :D
Bacteria that happen to have natural resistance to antibiotics survived and reproduced is one that best explains this in terms of natural selection <span>
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<span>no predator, Thus enabling it to it to grow and kick the other organism out of the area</span>
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