Which event must precede all others during tissue repair?
a. epithelia reproduce and migrate to the damaged area.
b. clotting occurs in the damaged area.
c. inflammation occurs near the affected cells.
d. fibroblasts produce collagen that strengthens the area surrounding the tissue damage.

I believe a wound has to clot before anything else happens

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

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: