The curve on the left shows the height of a population of penguins the curve on the right shows the population five years later what has happened to this population? a. stabilizing selection

b. disruptive selection

c. directional selection

d. polygenic selection

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.