Dif iii obj 713 38 ans b pts 1 dif iii obj 723 39 ans

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DIF: III OBJ: 7.1.3 38. ANS: B PTS: 1 DIF: III OBJ: 7.2.3 39. ANS: B PTS: 1 DIF: III OBJ: 7.3.1 40. ANS: A PTS: 1 DIF: III OBJ: 8.1.2 41. ANS: B PTS: 1 DIF: I OBJ: 8.2.1 42. ANS: B PTS: 1 DIF: III OBJ: 5.1.2 43. ANS: C PTS: 1 DIF: III OBJ: 5.1.2 44. ANS: C PTS: 1 DIF: III OBJ: 5.2.2 45. ANS: B PTS: 1 DIF: III OBJ: 5.2.2 46. ANS: B PTS: 1 DIF: III OBJ: 5.3.2 47. ANS: A PTS: 1 REF: act0976aaf18007e0a7_97 TOP: 1.3 Quiz NOT: 978-0-618-78317-5 48. ANS: C PTS: 1 REF: act0976aaf18007e0b7_97 NAT: NAS.NSES.SCI.96.9-12.C.1.2 | NAS.NSES.SCI.96.9-12.C.5.2 | NAS.NSES.SCI.96.9-12.C.5.3 TOP: 2.3 Quiz NOT: 978-0-618-78317-5 49. ANS: A PTS: 1 REF: act0976aaf18007e199_89 TOP: 15.3 Quiz NOT: 978-0-618-78317-5 50. ANS: D PTS: 1 REF: act0976aaf18007e199_105 TOP: 15.3 Quiz NOT: 978-0-618-78317-5 SHORT ANSWER 1. ANS: Answers may vary. Possible answers: food, water, energy, air, mineral nutrients, shelter, mates PTS: 1 DIF: II OBJ: 2.3.1
ID: A 3 2. ANS: freshwater, wetlands, estuaries, and marine PTS: 1 DIF: I OBJ: 4.1.5 PROBLEM 1. ANS: The graph should look similar to the following: PTS: 1 DIF: III OBJ: 3.4.2 | 3.4.3 2. ANS: As energy is passed from one level of a food chain to another, only about 10 percent of it is available to the next organisms up in the food chain. This occurs in part because all energy conversions involve a loss of energy in the form of heat. It is also partly due to the fact that each organism in a food chain requires energy to maintain its body’s activities. Thus, the amount of useful energy to do work and support life processes decreases as energy passes through trophic levels. PTS: 1 DIF: III OBJ: 4.2.2 3. ANS: a. Pyruvate is the primary energy-carrying molecule at the end of glycolysis. NADH is the primary energy-carrying molecule at the end of the Krebs cycle. ATP is the primary energy-carrying molecule at the end of the electron transport chain. b. A single arrow should be drawn indicating that oxygen is used in the electron transport chain. c. Three arrows should be drawn indicating that carbon dioxide is released in the Krebs cycle three times. PTS: 1 DIF: III OBJ: 9.3.2
ID: A 4 ESSAY 1. ANS: Organisms that have broad niches are more likely to survive because they are not likely to depend on a single food source or a single habitat. If one food source becomes scarce, they can turn to another; or if one habitat is destroyed, they can move to another. An organism having a narrow niche may depend totally on a single food source or require a specific habitat. If the food source or habitat is disrupted, the organism may not survive. PTS: 1 DIF: III OBJ: 5.3.1 2. ANS: Plants use the carbon dioxide in the atmosphere to build organic molecules during the process of photosynthesis, which releases oxygen into the environment. Plants and animals use this oxygen to break down organic molecules, which releases energy and carbon dioxide. Then, plants use the carbon dioxide. PTS: 1 DIF: III OBJ: 4.3.2

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