Author: Anonymous

21) Mechanical digestion, the process of breaking down large chunks of food into smaller pieces, is important because smaller pieces of food ________.

8) Which of the following combinations of phylum and description is incorrect?

17) Which of the following are the only extant animals that descended directly from dinosaurs?

36) Birds secrete uric acid as their nitrogenous waste because uric acid ________.

8) Which of the following combinations of phylum and description is incorrect?

11) What is a distinctive feature of the chondrichthyans?

17) Which of the following are the only extant animals that descended directly from dinosaurs?

35) The advantage of excreting nitrogenous wastes as urea rather than as ammonia is that ________.

28) Organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body’s cells are likely to have ________.

36) Birds secrete uric acid as their nitrogenous waste because uric acid ________.