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.
Answer:
ejfjfisioakendififidishwhej
Photosynthetic bacteria changed the Earth's atmosphere
A. Or C. Because, if I remember correctly, either one of those is correct
I think it is A. Though, hope this helps (╹◡╹)
<span>Natural selection favors G6PD deficiency as compared to malaria
Individuals in which the G6PD deficiency is common live in areas where malaria is an epidemic problem. Natural selection, a process which selects traits favorable traits out of a species' gene pool, will favor the individuals with G6PD deficiency to survive as they will not be affected by malaria. Their immunity to malaria will help these individuals pass on their genes better, meaning the gene for G6PD will become common, as is the case.
</span>