Answer: A
Explanation:
Oxygen makes up another 20 to 21 percent of our atmosphere. It's essential for life on Earth, and interestingly enough, it is poisonous when highly concentrated. Our concentration of 20 to 21 percent seems just right.
Reproduction, growth, renewal and repair are all reasons for cell division in multicellular organisms.
Cell division is a process that allows a parent cell divides into more smaller cells. It is classified as mitosis and meiosis. Mitosis produces diploid cells that will be used for growth or repairing tissue. Meiosis will produce gamete that has a role in reproduction.
Answer:
The answer is Carbon.
Explanation:
Carbon is the basic element where the most energy is stored and used as a fuel.
<em>For example,</em>
<em> consider a mountain whose summit is 5,000 feet (1,500 m) in elevation, but somewhere on the way up, the trail goes back down 250 feet (76 m). ... </em>
<em>If one hikes over five hills of 100 vertical feet each, the cumulative elevation gain is 5 × (100 feet (30 m)) = 500 feet (150 m).</em>
<em />
<span>bulimia nervosa
</span><span>
also known as simply bulimia,
is an eating disorder characterized by binge eating followed by
purging. Binge eating refers to eating a large amount of food in a short
amount of time. Purging refers to the attempts to get rid of the food
consumed. This may be done by vomiting or taking laxatives</span>
