<span>C) Bacterial genes are organized into operons, clusters of coregulated genes, that are regulated such that they are all turned on or off together. </span>
Answer: Blood flowing through the circulatory system transports nutrients, oxygen, and water to cells throughout the body. The journey might begin and end with the heart, but the blood vessels reach every vital spot along the way. These arteries, veins, and capillaries make for a vast network of pipes. If you were to lay out all the blood vessels of the body in a line, they would stretch for nearly 60,000 miles. That’s enough to circle the earth almost three times!
Explanation:
A molecule is the smallest particle of a substance that exists independently. Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms. ... The oxygen molecules are bonded or stuck together.
I believe it's A. If an organism changes and evolves slowly over time it is caused by variation, which helps the species adapt to it's habitat and way of life
