Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes species to change and diverge over time.
Answer:
DD or Dd
Explanation:
Dimples is the dominant trait (D). Your friend has dimples so that means he or she should have at least one allele of the dominant trait to express that trait. So your friend would either be homozygous dominant (DD) or heterozygous dominant (Dd). Notice that there is a recessive allele in the second. Even with that present, dimples would be still expressed.
Pairing of a specific purine to a specific pyrimidine is due to the structure and properties of each ring and the three-dimensional fit between complements. Purine and pyrimidine are organic, aromatic ring compounds that act as the building blocks of nucleic acid. In DNA, purines occur as adenine and guanine, while pyrimidines occur as thymine and cytosine. In DNA base pairing, adenine pairs with thymine, and guanine pairs with cytosine
Answer:
Type II diabetics have normal to elevated levels of insulin. What, then, might be causing their elevated blood glucose levels? B) defective receptors
Explanation:
Type II dabetics is known as the most common type in adults. In this type, people have normal to elevated levels of insulin. It is related to some other pathologies such as obesity, over weight, stress. <em>Type 2 diabetes is due to defective receptors. There is insuline in muscles, liver and fat tissues. This resistence shows the inhability of cells to respond to normal levels of glucose, elevating blood glucose levels.</em>
