How does the skeletal system help aid the body when it is sick? A. physical protection of internal organs from disease-causing organisms B. filtration of disease-causing organisms from the body C. production of white blood cells that can destroy disease-causing organisms
D. storage of calcium that makes bones stronger and less prone to attack from disease-causing organisms

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.

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