Answer:
The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen ... It sends out an electrical signal to start the contracting (pumping) of the heart muscle.
Explanation:
Answer:
B) The chromatids of each chromosome are separated.
there are 88 constellations in total
14,7,8 is incorrect
I think
