White blood cells can leave the blood circulatory system.

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How can you keep track of variables in a science experiment?

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants,the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.