The cell theory states that all cells arise from existing cells. Which scientist first determined this part of the cell theory?
A. Hooke
B. Schleiden
C. Schwann
D. Virchow

Sickle cell amelia is a condition condition where the red blood cells are deformed which is affected by sickle cell amenia

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit

They live on every continent except antarctica