It is difficult to calculate the Earth's carrying capacity because there are lots of resources that we can use and their is so much land on the earth that hasn't been used, but at the same time some resources are running low, and some resources we have a lot of, like food, so that it is why it is difficult to calculate
Answer: C.
Explanation:
Out of all of the answer choices, answer C most properly describes the cell cycle.
300 BC by Greek philosophers
Answer:
True
(I am not 100% sure because the question is very short with no context, but I believe it to be true)