Ecosystems have to have two factors working together in order to function. what are those two factors?
a. trees and biotic factors
b. temperature and abiotic factors
c. biotic factors and living factors
d. biotic factors and abiotic factors

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.