People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

They live on every continent except antarctica

Males of different species of the fruit fly drosophila that live in the same parts of the hawaiian islands have different elaborate courtship rituals. these rituals involve fighting other males and making stylized movements that attract females. what type of reproductive isolation does this represent?

What are the four phases of mitosis