A person who has allergies has a compromised immune system because the body's immune systemn attacks ts healthy cells.
noverreacts to an antigen.
steals nutrients from healthy cells.
responds to mutagens.

The cluster of developing cells from conception until birth is called an

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade

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.