Why do all cellular activities in living organisms use as a source of energy? a. atp b. lactic acid c. pyruvic acid d. dna

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.