If you grab a very hot coffee mug and hold on until you can put it safely down, rather than drop it right away, what has occurred?
A. Reflex arc
B. Relay arc
C. Photoreceptor
D. Modified reflex

Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

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.