Which of the following can NOT be inferred from the passage?
Answer(s): B
This is a 'NOT' question, so we need to eliminate answer choices that are reasonable inferences based on details from the passage. Answer choices (A 1-month-old alfalfa plant will have…) and (A 3-month-old alfalfa plant will have…) can be inferred from the mention that young plants still display the same “peculiarity.” In addition, since answer choices (A 1-month-old alfalfa plant will have…) and (A 3-month-old alfalfa plant will have…) seem to suggest the same thing, namely that younger alfalfa plants will have more bacteria than older alfalfa plants, they cannot both be invalid inferences, so you should eliminate (A 1-month-old alfalfa plant will have…) and (A 3-month-old alfalfa plant will have…). Answer choice (Bacteria is located…) can be eliminated because the author describes the nodules as the “home” of the bacteria. Finally, nothing in the passage allows us to infer that “a soil without lime will not grow bacteria”. The correct answer is (A soil without lime will not…).
The author of the passage suggests which of the following about bacteria?
For this inference question, look for statements based on facts explicitly stated in the passage. Eliminate choices that are out of scope, extreme, or that misuse details. Bacteria is microscopic, and can be described as compact.
According to the passage, dietary calcium intake
According to the author, dietary calcium intake "was measured by means of a semi-quantitative food-frequency questionnaire," not "by means of a semi-quantitative medical examination." The correct answer is a conclusion of the study discussed in the passage. The fact that 'daily calcium intake decreases the excretion of oxalate through the urinary tract,' is given as background information in the passage's second sentence.
The passage suggests that in conducting this medical study, researchers
Among the correct inferences that can be drawn from this passage, one is that researchers discovered associations they hadn't been looking for, the cited example being "surprisingly, intake of animal protein was directly associated with the risk of stone formation."
What is the main focus of this passage?
Answer(s): A
The main idea of the passage focuses on dietary calcium and its relationship to the kidneys and the formation of kidney stones.
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