9. What causes the oxygen molecules to move from the alveolus to the tiny blood capillary? Que causa que las mole'culas de oxi'geno se muevan desde el aveolo al vaso capilar?

Which term refers to the total dollar value of the goods and services produced in a country in a year?

What is the name for a substance formed in a chemical reaction

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.