Answer:
I think it's B
Explanation:
During QRS that's when the depolarization happens and when that happens the ventricles contract and push blood to the lungs and body.
Out of all the choises
a. cells are the building blocks of life
b. cells all arise from pre existing cells
<span>c. cells are the basic living units of structure an function </span>
<span>d. all of above
</span>it would be d
Yes, as scientists could figure out what might have changed in the variables she used. Brainliest me and I can give you the whole system.
Answer:
The fossils in the lower layers are older than the fossils in the upper layers.
Explanation: