Answer:
Chemical changes due to heat and pressure
Explanation:
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Answer:
1 Both processes occur during asexual reproduction.
Explanation:
It's the answer that makes the most sense.
The atria and ventricles work together, alternately contracting and relaxing to pump blood through your heart. ... The electrical activity spreads through the walls of the atria and causes them to contract. This forces blood into the ventricles. The SA node sets the rate and rhythm of your heartbeat.
I am Guessing Sperm and egg
The answer to your question is indeed <span>Precambrian. It lasted about 4 billon years.</span>
