<span>There is no set number of genes that produces a new species. </span>
Answer:
What is d. anti-B; A
Explanation:
A person with type A blood has Anti-B antibodies circulating through his or her plasma and produces A antigens on the cell surface.
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The vacuole is used to store waste products, water, or toxins. It is like a large holding tank for plant cells.
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The skin, mucous membranes, and endothelia throughout the body serve as physical barriers that prevent microbes from reaching potential sites of infection. Tight cell junctions in these tissues prevent microbes from passing through.