Learning to signal is not part of the description for communication.
Can you help me on my last question?
C a dog pants after running in the park
During exercise there is an increase in physical activity and muscle cells respire more than they do when the body is at rest. The heart rate increases during exercise. The rate and depth of breathing increases - this makes sure that more oxygen is absorbed into the blood, and more carbon dioxide is removed from it.
Answer:
D. The energy is used by organisms for life functions or is lost as heat.
Explanation:
There are give elements that DNA is made of. They are,
oxygen, nitrogen, hydrogen, carbon, and phosphorus.
Hope this helped!~