<span>The mechanism that affected the gene pool of the immigrants that entered the United States through Ellis Island from 1892 to 1954 is B. gene flow. Gene flow is the transfer of genes or alleles from one population to another. The migration of millions of individuals from countries across the Atlantic Ocean to the United States is responsible for the changes in the gene pool of the immigrants.</span>
Answer:
Some don't because of many things, disease and not getting enough food.
Explanation:
<span>"All organisms have the same proteins.
Proteins are composed of amino acids.
</span>The four bases in DNA are adenine, cytosine, guanine, and thymine.
These four are divided into two groups. The pyrimidines, the single-ring nitrogenous bases, is where thymine and cytosine is included. The purines, the double-ring nitrogenous bases, includes adenine and guanine.
<span>Cytosine will only bond with guanine; they form three hydrogen bonds. Adenine will only bond with thymine forming two hydrogen bonds."
Thanks @Taskmasters</span>
