Which of the following have features that show morphological convergence?
A. Sharks, penguins, and porpoises
B. Panthers and tigers
C. Apes and monkeys
D. Sharks, skates, and rays
E. Mice, rats, and gerbils
Answer: A
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The class of macromolecules in microorganisms that contributes MOST to biomass is
A) carbohydrates. B) DNA. C) lipids. D) proteins.
In secondary active transport, the movement of materials is driven by energy though no ATP (adenosine triphosphate) is expended. What is the source of energy that is driving secondary active transport?
a. The glucose involved in transport can be utilized as an energy source to drive the pump during secondary transport. b. As a secondary energy source, the cell can use the potential energy found in proteins. c. The electrochemical gradient created during primary active transport creates potential energy that translates to kinetic energy. d. Because the membrane is a phospholipid bilayer, it has plenty of lipids on hand to use as energy to drive secondary active transport.
What would you find in the heart of most reptiles?
A. two atria and two ventricles B. two atria and a partially divided ventricle C. one atrium and two ventricles D. two atria and one ventricle E. one atrium and one ventricle
Which of the following class of hypersensitivity reactions is not associated with autoimmunity?
A) cytotoxic B) delayed hypersensitivity C) allergies D) immune complex E) autoimmune