As a group, living things must be able to do all of the following except
a. remain without change over time.
b. obtain and use energy.
c. grow and develop.
d. respond to their environment.

A. Remain without change over time

Hope this will help :))

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: