When people interact in an effort to receive a reward or a return for their actions, a(n) has taken place.
a.
exchange
c.
barter
b.
division of labor
d.
both b and c

Which identifies the main purpose of biological taxonomy?

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?