Which of the following is not a means by which cell signal pathways are terminated?
a) the signal is terminated by the binding of an inactivator molecule to the signal molecule.
b) the signal may be pumped out of the cell or into storage.
c) the extracellular signal molecule may be degraded.
d) the extracellular signal molecule may be transported into cells.

Christie's doctor recommends that she eat 40 grams of protein a day. she's already consumed 50% of her protein recommendation for the day. how many servings of the given snack should christie have to meet her daily protein recommendation?

What was photo 51 with rosalind franklin?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.