Nucleotide substitutions in a gene occur at a relatively constant rate.
A nonsynonymous substitution is a nucleotide mutation that alters the amino acid sequence of a protein. Nonsynonymous substitutions differ from synonymous substitutions, which do not alter amino acid sequences and are (sometimes) silent mutations.
Answer:
Identify how the physical barriers of the immune system protect the body against pathogens?
skin contains tightly packed cells
•skin is tough, flexible, and waterproof
Explanation:
I don't know what options you have but in a situation of panic like this one, the sympathetic division of the nervous system is dominant. <span>The sympathetic division prepares the body for this situation in two possible ways to ensure survival: fight our flight. There will be increased </span><span>blood to vital organs(
<span> adrenaline</span>
<span> oxygen circulation),</span><span> blood clotting (minimizes loss of blood if wounded),</span> <span> peripheral vision (improves vision), etc to make a better response.
The answer is probably: dominance
</span></span>
Yes. It needs all its parts to survive.
The actual answer is, "A", an ocean trench.
You can find out more about them by researching them up on Google, it's only a few phrases and a hit on the enter key :P
