Unformatted text preview: on 58) Plant cells A) lack mitochondria and chloroplasts. B) lack mitochondria but have chloroplasts. C) have mitochondria but do not have chloroplasts. D) have mitochondria and chloroplasts. E) have chloroplasts and vestigial mitochondria. Answer: D Topic: 7.11 Skill: Conceptual Understanding 59) The addition of oxygen to RuBP by rubisco to form a two-carbon product that is then broken down by the cell to carbon dioxide and water defines A) cellular respiration. B) photorespiration. C) chemiosmosis. D) photophosphorylation. E) aerobic respiration. Answer: B Topic: 7.12-Evolution Connection Skill: Factual Recall 60) Photorespiration A) is an evolutionary relic from when atmospheric O2 levels were low and did not interfere with rubisco. B) is of benefit to the plant since it breaks down rubisco. C) is attributable to high CO2 levels. D) produces glucose. E) produces ATP. Answer: A Topic: 7.12-Evolution Connection Skill: Factual Recall 14 61) What is the main adaptive advantage of the C4 and CAM photosynthesis strategies over the C3 strategy? A) They help the plant conserve water and synthesize glucose efficiently under hot, dry conditions. B) They allow the plant to fix carbon more efficiently under conditions of low atmospheric CO2. C) They allow the plant to fix carbon more efficiently in dim or cool conditions. D) They make it possible for the plant to use the Calvin cycle at night. E) They allow the plant to avoid photorespiration by producing a four-carbon sugar in place of glucose. Answer: A Topic: 7.12-Evolution Connection Skill: Conceptual Understanding 62) The greenhouse effect is A) reduced by photosynthesis, which removes carbon dioxide from the atmosphere. B) made worse by photosynthesis, which adds carbon dioxide to the atmosphere. C) reduced by the burning of fossil fuels, which removes oxygen from the atmosphere. D) reduced by the addition of carbon dioxide to the atmosphere, since carbon dioxide removes excess heat from the Earthʹs surface and reflects it back into space. E) of little...
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- Fall '12
- Skill, Conceptual Understanding, Factual Recall