Hello,
I believe you're asking which option is true. If so, A) do not require a medium. Unlike mechanical waves, electromagnetic (or light) waves do not require a medium. It has been proven that light travels in a straight line. Light waves are, in fact, electromagnetic radiation, and they can travel in a vacuum.
Faith xoxo
Chromatin is dna that makes a chromosome and chromosomes are different dna strands in a cell, sister chromatids are identical pieces of dna
It goes prophase, metaphase,anaphase,telophase. so the answer is C.
Enzymes speed up the chemical reaction that takes place in cells. they are also important for digestion and metabolism.
<span> </span> <span>Mining is considered the dangerous job in the United States.
Hope this helps!</span>
