The first question please , I could really use the help , thank you :)

How do cells grow and reproduce to maintain homeostasis?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

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.