Which of the following BEST describes what alveoli are?
a. They are the smallest tubes in the respiratory system.
b. They have a small amount of surface area.
c. They are found on the end of bronchioles.
which of the following is an advantage of a centrally planned economy? A. it does not reward innovation. B. it sacrifices individual freedoms. C. it usually cannot meet consumers' needs and wants. D. it tries to meet explicitly stated goals.
Which of the following statements about biofuels is true? a. Biofuels are composed of 100% renewable materials. b. Algae is the leading source of biofuels. c. Energy processing from corn biofuels is not energy efficient. d. Corn is the only ...
What was one effect of the passage of the Immigration Act of 1924?
A. It created strong opposition from nativist groups.
B. It increased the labor pool for American manufacturers.
C. It drew a flood of immigrants from Asia and ...
What does the use of ellipses indicate in a piece of writing? A. A statement made with great emotion B. An error in the original text C. An upcoming question D. Missing words in a quotation