Autonomic nervous system (ANS)
Answer:
Mammals have four heart chambers
Explanation:
The answer is: The sun is called the ultimate source of energy because it is the source of almost all energies of the earth. Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.
Is this a true or false question? if so, the answer would be false because adrenaline increases your heart rate, evolution is how things grow and change over periods of time.
Answer:
yes it is reproduction hope it helps
