A disease has infected the local sea lion population. They become sick, and their population declines. Identify two organisms which may benefit from this decline and two organisms which may suffer. Explain why this advantage or disadvantage would occur.

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: