Exam 1_KEY - Fill out your scantron answer sheet Write in...

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Fill out your scantron answer sheet : Write in and bubble in your name and PID number. Leave the sequence number blank. You may write on this and YOU MAY KEEP IT! You will only be able to see your score later, so to know how you answered a specific question, keep track of your answers on these sheets too. **NOTE: You will only be able to see your score on onyen.unc.edu. Report any honor code violations to me. 1. A bunch of mothers want to rank baby diapers for their “Mommy-Baby” blog. They select three different types of diapers made of different materials: one cloth, one synthetic, and one with a mixture of cloth and synthetic material. The moms decide to do the following experiment: They wet each diaper with 5 mL of water every 5 minutes. They put the diapers on three robotic models that make continuous crawling movements much like a real baby. They check every 5 minutes to see if any of the diapers begin to leak. What can the team find out about the different diapers from doing just this experiment? 1) If the amount of water affects how long it takes the diapers to leak. 2) If the diaper material affects how long it takes the pieces to leak. 3) If the amount of water and the amount of robotic movement affect how long it takes the diapers to leak. 4) If the diaper material, the amount of water, and the amount of robotic movement affect how long it takes the diapers to leak. 2. The H2O molecules that form from aerobic respiration contain both hydrogen and oxygen atoms. Where did the oxygen atoms in these water molecules come from? 1) CO 2 2) atmospheric O 2 3) glucose 4) ATP 5) NADH 3. When a peacock butterfly has its wings closed, it is a dull color that blends with its environment. When a bird approaches the peacock butterfly, the butterfly repeatedly flicks its wings open and closed to show off brilliant colorful spots on its wings. The butterfly also makes hissing, clicking sounds. Which of the following is a conclusion you might draw from the experimental data below? 1) Neither wing spots nor hissing protect butterflies from bird predators; the spots and noises must play some other role. 2) The wings spots are a defense against other insects. 3) Wing spots help a Peacock butterfly camouflage into the environment. 4) The wing spots deter birds from butterflies more than the hissing noise. 5) Hissing from butterflies deters birds from eating the butterflies. Hissing sound silenced Wing spots painted over Number of Survivors Number eaten by birds Survival Rate Group 1 No No 100 0 100 Group 2 Yes No 50 50 50 Group 3 No Yes 100 0 100 Group 4 Yes Yes 50 50 50 4. A researcher wants to plot how the deer population changes in Chapel Hill suburbs from 1992- 2012. She records population size every 3 months in this 20 year period. What kind of graph would best allow a reader to see the change in population over time?
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