Classify the following according to whether they describe arteries, veins, or capillaries. a. Carry blood away from the heart to the capillaries b. Permit exchange of material with the tissues c. Return blood to the heart d. The largest in the human body is the aorta e. Join arterioles to venules f. Have valves that regulate the flow of blood

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the index of refraction of the second medium is higher. i just took the test trust me !

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.