4. why do you think it took so long for scientists to accept the idea of continental drift?

What are some characteristics of a free enterprise economy?

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false

Cancer cells spread to other parts of the body by entering the bloodstream. which of the following organs could prevent a cancer cell in the bloodstream from spreading, and why? a. the spleen, because it releases lymphocytes into the blood b. the peyer's patches, because they release lymphocytes into the blood c. the lymph nodes, because they release lymph into the blood d. the thymus, because it releases lymph into the blood