How many hydrogen atoms are in a molecule of water?

Select the correct answer. in the image, if the washcloth represents consumed food, which organ of the digestive system correctly represents the action performed by the hands? hands squeezing water from a washcloth a. esophagus b. large intestine c. liver d. mouth

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.

Why are human population trends difficult to predict?