Every year species go extinct.
a. 3
b. 72
c. 1000
d. 2

d.  20000

Explanation:

This is the right answer to the edge2020

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: