Make sure the protons and electrons are eaual
All animals have organs but plants don't?
I need a bit more information on this for a correct answer.
<span>Pathogenic bacteria found in gastrointestinal tracts. </span>It's a <span>probiotic bacterium.
I hope this helps;)
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I think the correct answer from the choices listed above is the last option. It is the need for oxygen that affects the heart rate in mammals. Depending on the needs of these organism, the oxygen needed for the processes inside the body varies which then affect the heart rate.
<span>Sunset, this is really similar to the question about molecular clocks you asked. The more closely related the three species are, the more similar the homologous proteins will be in each of the species.
Defining 'sequence similarity' is a little bit nuanced. It can refer either to the genetic code or the amino acid code. Because the genetic code is degenerate multiple codons code for the same amino acid - mutations in the gene don't result in mutations in the proteins when the mutated codon codes for the same amino acid as the unmutated codon.
Similarly, you can sort of think of some amino acids as being redundant. In some cases, replacement of one amino acid with another doesn't result in all that much change to the protein's structure or function. The result is, as species diverge and mutations build up, they build up preferentially in certain domains of the protein and more frequently involve replacement of one amino acid with one which is pretty much similar to it.</span>
