I would have to say (D.) if it's been 150 years.
The answer is C, When the hemisphere is tilted toward the sun and the sun reaches its lowest point in the sky.
The process is negative selection
Answer:
Heterozygous people for sickle cell anemia are more resistant to the debilitating effects of malaria than the normal homozygous people.
Since the greenhouse effect causes the earth to be warmer than it would be without the atmosphere, the earth would be cooler and the temperature would be nearly 0 degrees fahrenheit instead of the average 59-60 degrees fahrenheit