Blue eyes are recessive in humans if 20% of the population has blue eyes. What is the frequency of the heterozygous individuals in this population?
a. 0.50
b. 0.31
c. 0.55
d. 0.45

uh two lol

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.