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13 Jul 2026, 10:09
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This question has a few traps to watch out for but it is very clear once it is mapped out.
What the question provides is the link between algae and reproductive success. According to the question stem, the fish prefer to lay their eggs in algae to lay their eggs rather than the bare sections. This suggests that the algae is the factor responsible for their reproductive success.
To undermine this, we need to demonstrate that algae is not the cause for reproductive success and there may be other factors at play, all things being equal in that biome which may point to the reproductive successes also:
Now to the options:
A - Fish in the study area lay their eggs on bare surfaces rather than algae surfaces. Yes this is tempting but see what is the question stem. It talks about disturbed vs. undisturbed sections. We do not get any information that the bare surfaces mentioned in (A) are a result of disturbance or natural. If they are natural, then it has nothing to do with the experiment.
B - CORRECT. This is the primary option that discusses the difference between DISTURBED vs. UNDISTURBED sections. If the substrate below the algae is damaged during the scraping process and this is the reason the fish do not lay their eggs in the disturbed portions, then it might be this factor which is responsible for the reproductive success and not algae at all. It could be Undisturbed and bare Rock like how option (A) states but the required sub-stratum particles that enable the success need to be present. So whether algae is there or not is irrelevant. That's why this option eliminates algae as a factor for reproductive success, and hence is the correct one.
C - Irrelevant. It is a statement already provided in the Question stem, and moreover strengthens the conclusion.
D - Another trap. In this question, the proportion of eggs hatching to measure reproductive success isn't the metric. The metric is whether the fish prefer the disturbed vs. undisturbed sections and if so why. Therefore, this option goes out of scope.
E - We are not concerned with the other possible or associated harmful effects of algae. Hence it is irrelevant.
What the question provides is the link between algae and reproductive success. According to the question stem, the fish prefer to lay their eggs in algae to lay their eggs rather than the bare sections. This suggests that the algae is the factor responsible for their reproductive success.
To undermine this, we need to demonstrate that algae is not the cause for reproductive success and there may be other factors at play, all things being equal in that biome which may point to the reproductive successes also:
Now to the options:
A - Fish in the study area lay their eggs on bare surfaces rather than algae surfaces. Yes this is tempting but see what is the question stem. It talks about disturbed vs. undisturbed sections. We do not get any information that the bare surfaces mentioned in (A) are a result of disturbance or natural. If they are natural, then it has nothing to do with the experiment.
B - CORRECT. This is the primary option that discusses the difference between DISTURBED vs. UNDISTURBED sections. If the substrate below the algae is damaged during the scraping process and this is the reason the fish do not lay their eggs in the disturbed portions, then it might be this factor which is responsible for the reproductive success and not algae at all. It could be Undisturbed and bare Rock like how option (A) states but the required sub-stratum particles that enable the success need to be present. So whether algae is there or not is irrelevant. That's why this option eliminates algae as a factor for reproductive success, and hence is the correct one.
C - Irrelevant. It is a statement already provided in the Question stem, and moreover strengthens the conclusion.
D - Another trap. In this question, the proportion of eggs hatching to measure reproductive success isn't the metric. The metric is whether the fish prefer the disturbed vs. undisturbed sections and if so why. Therefore, this option goes out of scope.
E - We are not concerned with the other possible or associated harmful effects of algae. Hence it is irrelevant.
13 Jul 2026, 10:30
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The option chosen is B. The explanations are as follows:
A - This fact is not realted to study and this contradicts the fact present in the passage as it mentions the fish preferred to lay eggs on the algae surface.
B- This could be the most reasonable reason why fish didn't lay eggs in the section where Algae was removed. so the correlation of algae vs non-algae surface can't be the reason of latching fewer eggs, whereas the reason is something different.
C- It will strengthen the claim of latching an egg on the algae surface.
D- Out of scope. The author never claimed the right indicator. It claim Algae surface is better suited for Latching egg.
E- This could be a possibility after latching the egg, but it is out of scope for now what happened after latching egg.
A - This fact is not realted to study and this contradicts the fact present in the passage as it mentions the fish preferred to lay eggs on the algae surface.
B- This could be the most reasonable reason why fish didn't lay eggs in the section where Algae was removed. so the correlation of algae vs non-algae surface can't be the reason of latching fewer eggs, whereas the reason is something different.
C- It will strengthen the claim of latching an egg on the algae surface.
D- Out of scope. The author never claimed the right indicator. It claim Algae surface is better suited for Latching egg.
E- This could be a possibility after latching the egg, but it is out of scope for now what happened after latching egg.
Bunuel
13 Jul 2026, 10:47
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imo B.
A - Strengthens the argument a bit.
B - correct: if scraping causes abrasion which reducing suitability than the reasoning is weakened.
C - strengthens the argument.
D - irrelevant - different metrics of success.
E - irrelevant - doesn't discuss the argument but the long term effect.
A - Strengthens the argument a bit.
B - correct: if scraping causes abrasion which reducing suitability than the reasoning is weakened.
C - strengthens the argument.
D - irrelevant - different metrics of success.
E - irrelevant - doesn't discuss the argument but the long term effect.
