32. You are examining two eukaryotic cells. One cell is spherical and has a surface area to volume ratio of 4:1. The second cell is flat and has a surface area to volume ratio of 7:1. Identify which of these cells will be most efficient in diffusing materials throughout the cell and explain your answer in terms of the SA:V ratio. 

29. Match the organelle to its function within a eukaryotic cell. 

26. Synaptic signaling is most often used by cells when a message must travel long distances within the body. 

15. All of the components are found in prokaryotic cells except

42. Which of the following is not one of the observations made by Charles Darwin as he developed his theory of natural selection and the evolution of organisms?  

4. The diagram below represents a typical rod-shaped bacterium. Which of the following best describes a feature shown in the diagram that is unique to archaea and bacteria?

25. Which of the following represents correctly paired DNA nucleotides? A) Adenine with Thymine B) Adenine with Guanine C) Cytosine with Thymine D) Cytosine with Adenine

28. Which of the following properties of water is directly related to water’s ability to form weak hydrogen bonds with other water molecules? A) Property of expansion upon freezing B) Property of cohesion C) Property of water as a universal solvent D) Property of water as a regulator of temperature

22. Protein serve multiple complex functions within biological systems. Which of the following is not  an essential function of proteins within an organism? A) Proteins serve as antibodies to fight foreign invaders B) Proteins serve as enzymes to catalyze chemical reactions C) Proteins serve as structural molecules in skin and muscles D) Proteins serve as the major component of the cell membrane of most organisms.

2. Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? A) The high specific heat capacity of water allows the body to absorb a large amount of excess heat energy. B) The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas. C) The high surface tension of water contributes to the physical process by which water leaves the body. D) The high melting temperature of water allows the body to remove excess heat through a phase change of water from solid to liquid.