Answer:
Chemicals that are secreted from antigen-presenting cells then activate helper T cells.
Explanation:
They would have had to have received the gene from both their mother and father. This gene is carried on the X chromosome and is only shown in females when it is present on both.
Diffusion, osmosis, and facilitated diffusion.
Answer:
Amino acids are organic compounds: meaning they contain carbon, hydrogen, oxygen and nitrogen. They are the building blocks, or monomers of proteins. They are made of a carboxyl group and an amino group. There is also a side chain, that is different for each of the 20 amino acids.
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