Answer:How long each heart beat are apart
Explanation:
the vein isnt conected to ur heart :P
The right answer is A. An impact of changing scientific knowledge on society
That would be active transport
Answer:
While sunlight is the energy source, the greatest force propelling the water cycle is gravity. Gravity is the force of attraction between two objects, and Earth's gravity pulls matter downward, toward its center. It pulls precipitation down from clouds and pulls water downhill. Gravity also moves air and ocean water.
Explanation:
