Scenario #3 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 (ppgenotype).
qi-
Q-
p-
pi-

blah

explanation: bc blah

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

it depends on how much it could carry.

i think the answer is a.keratin is the pigment responsible for skin color.