Ascientist conducts an experiment to test the effects of light on earthworm activity. which is a variable in this experiment?

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.