PT114.S2.Q22

SECTION 1 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 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 2 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 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

SECTION 3 · rc

PASSAGE 1
Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8

PASSAGE 2
Question 9 Question 10 Question 11 Question 12 Question 13 Question 14

PASSAGE 3
Question 15 Question 16 Question 17 Question 18 Question 19 Question 20

PASSAGE 4
Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 4 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 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

PrepTest 114 - Section 2 - Question 22

Question

Explanation

Analytics

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Some types of organisms originated through endosymbiosis, the engulfing of one organism by another so that a part of the former becomes a functioning part of the latter. ██ ███████ ████████████ █ █████████ ████ ████████ ███ ███ █████████ █ ████ ████████ ███ ████ ██████████ ██████ █ █████ █████ ██ █ ███████████████████ ███ ████████ ██ █ ██████████ ████ ████ ████ █████ ██ ███ ███ ██ ████ ████████████ ███ ███ █████ ██████ ██ ████ ████ █ ██████ ███████ ██ ████ ████ ██ ███ ███████████ ████ ███ ███ ███████ ██ ██ ████████ ██████████ ████████

Summary

Organisms can be created through endosymbiosis, which is when organism A absorbs organism B, so organism B becomes part of organism A. We’ve also learned that a particular plant, “C,” contains a strange nucleomorph. Nucleomorphs are similar to cell nuclei, and contain DNA. The nucleomorph in plant C is strange because its DNA has two copies of a certain gene, which we would only expect if the nucleomorph had originally been an absorbed organism’s nucleus.

Strongly Supported Conclusions

The facts above strongly support the conclusion that the nucleomorph in plant C was originally an organism that was absorbed, meaning that plant C is a product of endosymbiosis.

Analysis by AlexandraNash

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22.

Which one of the following ██ ████ ████████ █████████ ██ ███ ███████████ ██████

Only organisms of █████ ████ ██████████ ███████ █████████████ ███████ █████████████

This is not supported. The stimulus doesn’t reveal much about where nucleomorphs come from. We can infer that the nucleomorph in plant C comes from endosymbiosis based on the facts given, but that doesn’t tell us about the origins of other nucleomorphs.

A nucleomorph within ███ ██████████████████ █████ ███ ██ ███ ███████ ████████ ██ ████ █████ █████████

This is not supported. We know that the nucleomorph in plant C contains some DNA, but we definitely don’t have enough information to say that the DNA is a full copy of another organism’s genetic material.

Nucleomorphs originated when ██ ████████ █████████████████ ████████ █ ███████████████████

This is anti-supported. From the facts, we know that plant C itself contains at least one nucleomorph, so it wouldn’t make sense for nucleomorphs to originate from plant C getting absorbed. For that to work, plant C would have to absorb itself, which is far-fetched.

Two organisms will ███ ███████ █████████████ ██████ ██ █████ ███ ██ ████ ████████ █ ████████████

This is not supported. The stimulus doesn’t suggest much about the relationship between endosymbiosis and nucleomorphs. We definitely can’t say that an organism already containing a nucleomorph is necessary for endosymbiosis to occur.

Chlorarachniophytes emerged as ███ ██████ ██ ███ █████████ ██████ █████████ ██████████████

This is strongly supported. The stimulus strongly implies that the nucleomorph within plant C used to be another organism that was absorbed, and we know that endosymbiosis is the name for that process. Thus, plant C probably comes from endosymbiosis.

Difficulty

Question

63% of people who answer get this correct

This is a very difficult question.

CURVE

Score of students with a 50% chance of getting this right

25% 148

160

75% 172

Analysis

Question Stem Tags

Most strongly supported

Stems that ask which answer choice is "most strongly supported" by the claims in the stimulus. Related to MBT/Inf, but with a lower standard of support.

Answer Popularity

Popularity Avg. score

163

17%

164

11%

162

157

63%

168

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