The athletes cells have been trained for the stress of a race, such as the stretching of muscle cells being ready to take in more oxygen.
Answer:
Yes it is living any multicellular organisms are living
Explanation:
A. mutation is the correct answer.
Hello!
The heart is kind of like the "base" or "hub" for blood. The heart will send of blood and receive blood, and send it off again. It allows for blood to be bumped through the whole body.
I hope this helps!
B. Microorganisms are extremely small, and as a result, cannot be sensed in much of any ways.