A normal heart rate ranges between 60-100 beats per minute. The higher the heart rate is, the faster the blood is pumping through the heart. When exercising a persons heart will be higher because the brain and the muscles in the body are in need of oxygen so the heart needs to pump faster in order to sustain optimal performance.<span />
Human bodies contain enzymes that can break down starch into glucose and use it for fuel. We do not have the enzymes necessary to breakdown cellulose.
Explanation:
An example of homologous structures in vertebrates is
where the wings of bats, front flippers of whales, and forelegs of four-legged vertebrates like dogs and crocodiles are all derived from the same ancestral tetrapod structure.
Some codons are sup pressed, so they do not appear to be producing any proteins. These amino acids may be part of such codons.
C is correct i believe i think all the others are wrong but im not entirely sure