LSAT 115 – Section 2 – Question 16
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Question QuickView |
Type | Tags | Answer Choices |
Curve | Question Difficulty |
Psg/Game/S Difficulty |
Explanation |
---|---|---|---|---|---|---|---|
PT115 S2 Q16 |
+LR
| Argument part +AP | A
2%
156
B
7%
157
C
16%
158
D
67%
164
E
9%
156
|
145 155 165 |
+Harder | 148.811 +SubsectionMedium |
Summarize Argument: Counter-Position
The author concludes that biologists disagree about which species of fish from which humans evolved. The author proceeds to outline two biologists’ perspectives. The biologists agree that frogs are related to this species of fish. Dr. Stevens-Hoyt says that lungfish are the ancestor of humans because the mitochondrial DNA of lungfish is similar to that of frogs. Dr. Grover rejects Dr. Stevens-Hoyt because mitochondrial DNA evolves too rapidly to demonstrate relationships between species. Rather, Dr. Stevens believes that coelacanths are the ancestor of humans because the hemoglobin of coelacanths matches that of tadpoles.
Identify Argument Part
The proposition in the question stem refers to a point of agreement between the scientists.
A
Since it implies that human beings are not descended from lungfish, it is cited as evidence against the claim that humans are descended from lungfish.
The proposition in the question stem does not imply that human beings are not descended from lungfish. The author does not take a side in this dispute; the author simply provides a brief outline of two different theories.
B
Since it implies that human beings are not descended from coelacanths, it is offered as evidence against the claim that human beings are descended from coelacanths.
The proposition in the question stem does not imply that human beings are not descended from coelacanths. The author does not take a side in this dispute; the author simply provides a brief outline of two different theories.
C
It is offered as evidence for the contention that human beings must be descended from either lungfish or coelacanths.
The author does not say definitively that either Dr. Stevens-Hoyt or Dr. Grover must be correct; the author is simply outlining two different theories. The author does not contend that humans must be descended from either lungfish or coelacanths.
D
It is an assumption that both parties to the dispute use as a starting point for their arguments about human evolution.
Both biologists use the fact that frogs are related to the species of fish from which humans evolved as a premise for their arguments. This is a point of agreement; while they draw different conclusions from this information, it is a key premise for each argument.
E
It implies that either a match of mitochondrial DNA or a match of hemoglobin between lungfish and coelacanths would show that human beings evolved from one of these two species.
The claim in (E) is not an implication made by the argument.
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LSAT PrepTest 115 Explanations
Section 1 - Reading Comprehension
- Passage 1 – Passage
- Passage 1 – Questions
- Passage 2 – Passage
- Passage 2 – Questions
- Passage 3 – Passage
- Passage 3 – Questions
- Passage 4 – Passage
- Passage 4 – Questions
Section 2 - Logical Reasoning
- Question 01
- Question 02
- Question 03
- Question 04
- Question 05
- Question 06
- Question 07
- Question 08
- Question 09
- Question 10
- Question 11
- Question 12
- Question 13
- Question 14
- Question 15
- Question 16
- Question 17
- Question 18
- Question 19
- Question 20
- Question 21
- Question 22
- Question 23
- Question 24
Section 3 - Reading Comprehension
- Passage 1 – Passage
- Passage 1 – Questions
- Passage 2 – Passage
- Passage 2 – Questions
- Passage 3 – Passage
- Passage 3 – Questions
- Passage 4 – Passage
- Passage 4 – Questions
Section 4 - Logical Reasoning
- Question 01
- Question 02
- Question 03
- Question 04
- Question 05
- Question 06
- Question 07
- Question 08
- Question 09
- Question 10
- Question 11
- Question 12
- Question 13
- Question 14
- Question 15
- Question 16
- Question 17
- Question 18
- Question 19
- Question 20
- Question 21
- Question 22
- Question 23
- Question 24
- Question 25
- Question 26
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