Answer:
well, I'm no college student but using common sense you need more than one so when one fails the other can come in and hopefully succeed.
Explanation:
Answer:
Human Activitys.
Explanation
The goods we use, travel around the world very quickly, and they often carry uninvited species with them.
Answer:
The answer is A. Bacteria and Archaea
Explanation:
Answer;
Opponent process theory
Explanation;
-Opponent process theory suggests that color perception is controlled by the activity of two opponent systems: a blue-yellow mechanism and a red-green mechanism.
-The opponent process theory suggests that the way humans perceive colors is controlled by three opposing systems. We need four unique colors to characterize perception of color: blue, yellow, red, and green. According to this theory, there are three opposing channels in our vision; these are blue vs yellow, red vs green and black vs white.
