The best answer is D. He extracted and observed DNA from white blood cells. He is a Swiss physician and a biologist who is known to be the first researcher to identify nucleic acid. He isolated various phosphate-rich chemicals , which he called nuclein or what we know now as nucleic acid, from white blood cells' nuclei which paved the way for him to discover and identify DNA.
Answer:
Negative feedback.
Explanation:
The normal carbon dioxide levels after resting, the breathing rate also decreases which is an example of negative feedback because the body moves towards stability or equilibrium conditions. There is a direct relationship between breathing rate and carbondioxide levels means if one is increases the other automatically increases in order to maintain homeostasis in the body so we can say that this relationship is very important to maintain .stability in the body
C. Mendel is considered "The father of genetics". Because he discovered the tall and short pea plants
<span>Cigarettes were not outlawed when the dangers were first noticed, because their lobby is very strong. Their industry is gaining lots of money by selling cigarettes, so they didn't want to stop producing them. Instead, they settle for reducing the nicotine and inventing new forms of cigarettes (the electrical ones for example).</span>
Special cells, just behind the radicule, plumule or in buds. divide using mitosis