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17 May 2021, 06:00
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Which of the following most logically completes the argument?
A chemical compound has been developed that disrupts the biological messages responsible for the later stages of embryonic development during the reproduction cycles of certain sea creatures. Upon introduction into an area of the ocean, the compound spreads outwards and downwards, reaching an active depth of up to 20 feet. The inventors of the compound are aiming primarily at offering it as a method for controlling the numbers of jellyfish although this will clearly be unsuccessful since __________.
A. such an invention will most likely be implemented by groups looking to reinstate balance in ecosystems that have been damaged
B. the vertical order of a mixture of different liquids is determined by the relative density of each individual liquid
C. the planula, a pre-embryonic creature spawned from a jellyfish pair, may swim freely in the ocean for several days before reaching its destination on the sea bottom
D. shortly after fertilization, jellyfish larvae become plant-like polyps, which rooted to the sea floor, facilitate budding, and the final release of offspring
E. jellyfish are either male or female, and through the release of sperm and eggs into the open water, perform fertilization
A chemical compound has been developed that disrupts the biological messages responsible for the later stages of embryonic development during the reproduction cycles of certain sea creatures. Upon introduction into an area of the ocean, the compound spreads outwards and downwards, reaching an active depth of up to 20 feet. The inventors of the compound are aiming primarily at offering it as a method for controlling the numbers of jellyfish although this will clearly be unsuccessful since __________.
A. such an invention will most likely be implemented by groups looking to reinstate balance in ecosystems that have been damaged
B. the vertical order of a mixture of different liquids is determined by the relative density of each individual liquid
C. the planula, a pre-embryonic creature spawned from a jellyfish pair, may swim freely in the ocean for several days before reaching its destination on the sea bottom
D. shortly after fertilization, jellyfish larvae become plant-like polyps, which rooted to the sea floor, facilitate budding, and the final release of offspring
E. jellyfish are either male or female, and through the release of sperm and eggs into the open water, perform fertilization
23 May 2021, 05:00
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OFFICIAL EXPLANATION
Which of the following most logically completes the argument?
A chemical compound has been developed that disrupts the biological messages responsible for the later stages of embryonic development during the reproduction cycles of certain sea creatures. Upon introduction into an area of the ocean, the compound spreads outwards and downwards, reaching an active depth of up to 20 feet. The inventors of the compound are aiming primarily at offering it as a method for controlling the numbers of jellyfish although this will clearly be unsuccessful since __________.
A. such an invention will most likely be implemented by groups looking to reinstate balance in ecosystems that have been damaged
Incorrect.
This is a "Complete the Argument" format question. The missing argument part follows the expression this will clearly be unsuccessful and the reason conjunction since, so it's a premise, which undermines the conclusion. Therefore, this is a Conclusion Weakening question:
- Premise A: a chemical has been developed that makes it difficult for some sea creatures to reproduce by causing problems during the later reproductive stages
+
Premise B: when the chemical is placed in the sea, it spreads outwards and downwards and is effective at a depth of up to 20 feet
=
Inventors' Conclusion: the chemical will be effective in controlling jellyfish number
Weakening Data: ?
You are required to find data that undermines the inventors' conclusion.
This answer choice neither weakens nor strengthens the conclusion and therefore cannot logically complete the argument. The users of the invention and the fact that it will be used tell us nothing of whether or not it will be successful.
B. the vertical order of a mixture of different liquids is determined by the relative density of each individual liquid
Incorrect.
This answer choice neither weakens nor strengthens the conclusion and, therefore, cannot logically complete the argument. We already know the chemical spreads down to 20 feet so this physical rule does not help us evaluate its effectiveness.
C. the planula, a pre-embryonic creature spawned from a jellyfish pair, may swim freely in the ocean for several days before reaching its destination on the sea bottom
Incorrect.
This answer choice neither weakens nor strengthens the inventors' conclusion and therefore cannot logically complete the argument. The chemical is designed to attack reproduction at a late embryonic stage whereas the planula is a pre-embryonic creature.
D. shortly after fertilization, jellyfish larvae become plant-like polyps, which rooted to the sea floor, facilitate budding, and the final release of offspring
This answer choice weakens the inventors' conclusion and therefore logically completes the argument. If after fertilization, the reproductive process of jellyfish takes place on the sea floor, then the chemical, which is only active in the top 20 feet of the ocean, will not be capable of affecting the reproduction in any way.
E. jellyfish are either male or female, and through the release of sperm and eggs into the open water, perform fertilization
Incorrect.
This is a "Complete the Argument" format question. The missing argument part follows the expression this will clearly be unsuccessful and the reason conjunction since, so it's a premise, which undermines the conclusion. Therefore, this is a Conclusion Weakening question:
- Premise A: a chemical has been developed that makes it difficult for some sea creatures to reproduce by causing problems during the later reproductive stages
+
Premise B: when the chemical is placed in the sea, it spreads outwards and downwards and is effective at a depth of up to 20 feet
=
Inventors' Conclusion: the chemical will be effective in controlling jellyfish number
Weakening Data: ?
You are required to find data that undermines the inventors' conclusion.
This answer choice neither strengthens nor weakens the conclusion and, therefore, cannot logically complete the argument. Since the chemical compound effects the later stage of reproduction, details about jellyfish fertilization are irrelevant.
General Discussion
17 May 2021, 10:19
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Complete an argument is a form of strengthening the argument or weaken the argument or it is a conclusion/inference
This is the case is a conclusion
If the jellyfish, once incepted, will become another form, in this case, plant-like, the chemical compound will not have any effect
D is the answer
This is the case is a conclusion
If the jellyfish, once incepted, will become another form, in this case, plant-like, the chemical compound will not have any effect
D is the answer
