Dr. Blackwell caused rats to stop breathing when he lesioned their MEDULLA.
When doctor Blackwell induced a lesion in the rats' medulla, he discovered that the rats stopped breathing. He explained this observation by saying that the medulla has functional role to play in the breathing process of rats.
The answer is D. An irritant that because embedded in the mantle
The answer would be C, "The earth is heated by terrestrial radiation."
Terrestrial radiation is a factor in what heats up the earth and it's a major factor in the study of global warming.
The greatest advantage of using DNA technology to produce medicines has been that B. medicine can be distributed at a reduced cost. The medicine becomes easier to produce due to DNA technology. One may consider insulin as an example of this, which had to be extracted from the blood from animals before it could be produced using DNA technology.
Answer:
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Explanation:
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