This should be the cell membrane.
Answer: uracil is found in RNA nucleotides, but NOT in DNA, i hope that helps
Explanation:
Answer:
Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
Natural selection is the concept of how only the strong will survive, <span> genetic traits due to mutations. </span>
