One cardiac cycle is .8 seconds. A complete heartbeat is produced in one cardiac cycle. <span>The period of time that begins with contraction of the atria and ends with ventricular relaxation is known as the cardiac cycle. The period of contraction that the heart undergoes while it pumps blood into circulation is called systole.</span>
Answer: B
Explanation: Mars and Venus are terrestrial so a planet in between would be as well
Some of the best evidence for the theory of plate tectonic are earthquakes, plants that are in different continents across the ocean,or mountains. Some of the best evidence for the theory of plate tectonic are earthquakes, plants that are in different continents across the ocean,or mountains.
Answer:
the same
I think I believe it does
Well obviously if all the water drains out they will all die.
C. The species will become extinct.
Hope this helps.
