Answer:
in controlled experiment an independent variable is systematically manupulated and dependent variable is measured ; any extraneous variables are controlled
-engaging in regular physical activity
-taking care of yourself by eating well
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Whta are you asking here?
____ take blood away from the heart & ____ brings the blood back to the heart. Arteries veins .... Which disease occurs when there is an abnormal increase in the number of white blood cells, which results in fewer red blood cells carrying oxygen to body tissue? Leukemia ... Platelets, Red blood cells, White blood cells.
