If a mutation occurs in the gene for the lac repressor and results in a repressor that does not bind lactose, which of the following will be observed?
a. the mutant will not be able to grown on lactose.
b. the mutant will only be able to grow on lactose.
c. the mutant will be able to grow on lactose and on other sugars.
d. the mutant will be harmed by the presence of lactose.

What maintain homeostasis when a persons internal body temperature is 97.5°f

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

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.