Question 7 (2 points) How are chemical and physical changes different on a molecular level? (2 points)
Chemical changes involve the breaking of bonds in molecules.
Chemical changes do not affect bonding between atoms.
C
Physical changes do not involve molecules.
Physical changes cause new molecules to form.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

the correct answer is d

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: