How does the amount of biomass at the fourth trophic level compare to the amount of biomass at the third trophic level immediately below it

b.have there own function.

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: