There is a population of squirrels who have bushy or hairless tails. 75% of the hairless tailed squirrels leave the area and migrate to Branchburg. Meanwhile, 5 new squirrels enter the area and have straight haired tails. What type of evolutionary mechanism has occurred?

A. genetic drift
B. gene flow
C. natural selection
D. non-random mating

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.