Although a number of muscles may be involved in an action, the principal muscle involved is called the prime mover, or . A muscle with the opposite action of the prime mover is called an .

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

answer; (b) clear with a slight blue tint;