Birds and mammals independently evolved four-chamber hearts
Answer:
c
Explanation:
These thyroid hormones stimulate all the cells in the body and control biological processes such as growth, reproduction, development, and metabolism.
Answer:
compression and rarefaction
Explanation:
This kind of wave is called a longitudinal wave and an example of such a wave is a sound wave. The center of compression can be analogous to the top of a crest of a transverse wave while the center of the rarefaction would be analogous to the bottom of the trough of a transverse wave.
After my research the answer is that they are forms of electromagnetic radiation as far as I know.