Passing the AP American Government and Politics exam demonstrates to colleges that you understand content taught at the college level. Furthermore, if you pass the exam, you receive college credit by most colleges. You can also show your interest in American Government and Politics by taking the exam.
Answer:
The tundra is the coldest of the biomes. It also receives low amounts of precipitation, making the tundra similar to a desert.
(Source: https://earthobservatory.nasa.gov/biome/biotundra.php)
The answer to your question is: D. Separate schools can never be equal.
D, his experiment was based on the genetic traits of the pea plants, so pollination from other plants would mess up his experiment, hope this helps!!