Which types of organisms developed first due to the early environmental conditions on Earth?
C. eukaryotic and aerobic
D. eukaryotic and anaerobic
A. prokaryotic and aerobic
B. prokaryotic and anaerobic

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

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.