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19. Which organelle often takes up much of the volume of a plant cell?

What is the first step in the discovery and recovery of human bodies in forensic biology?

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?  

15. What results from an equal sharing of electrons between atoms? A) a nonpolar covalent bond B) a polar covalent bond C) an ionic bond D) a hydrogen bond E) a hydrophobic interaction

31. You are conducting an experiment to determine the effect of varying levels of caffeine on high school swimmers. You will be varying the amounts of caffeine consumed by each swimmer 1 hour before swimming a 200 meter race. You have already recorded times for each swimmer at a normal practice, without the use of caffeine supplements for comparison to your results.               Use the information provided to correctly match the variables for this experiment.     

6. Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and  steroids? 

7. Which of the following best summarizes the relationship between dehydration reactions and hydrolysis? A) Dehydration reactions split water molecules and add hydroxyl groups to polymers, and hydrolysis reactions remove hydroxyl groups from polymers. B) Dehydration reactions assemble polymers, and hydrolysis reactions break down polymers. C) Dehydration reactions create monomers, and hydrolysis reactions assemble polymers. D) Dehydration reactions break down polymers, and hydrolysis reactions create monomers.

29. Which of the following was Charles Darwin’s most significant original contribution to understanding both the unity and diversity of life? A) He documented examples of organisms that had evolved over time.B) He proposed a mechanism to explain the process of evolution. C) He explained the relationship between genes and evolution.D) He observed that individuals in a population generally displayed variation for a number of traits.E) He suggested that survival depends upon competition.

13. Which of the following is a complex carbohydrate commonly used as long-term energy storage in  the liver of mammals? A) Phospholipids B) Polypeptides C) Glycogen D) Cellulose

16. Which of the following would be considered an organic molecule? A) H2O B) H2S C) C6H12O6 D) H2SO4