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07 Jul 2025, 21:31
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A. Correct
If hybrid offspring had lower survival rates, they may have died before reproducing. This explains why GM genes were initially present but disappeared later.
B.If predators avoid GM salmon, those fish should survive longer. This would increase, not decrease, the presence of GM genes — doesn’t explain the disappearance.
C. Explains behavior of escaped GM salmon, not survival of their offspring. Doesn’t account for why GM genes vanished in the wild population.
D. Migration affects where salmon are sampled but doesn’t explain total absence of GM genes in hundreds tested. Sampling error unlikely with large sample.
E. Even a small number of GM salmon can interbreed and pass on genes. Doesn’t explain how GM genes were detected before but later disappeared.
If hybrid offspring had lower survival rates, they may have died before reproducing. This explains why GM genes were initially present but disappeared later.
B.If predators avoid GM salmon, those fish should survive longer. This would increase, not decrease, the presence of GM genes — doesn’t explain the disappearance.
C. Explains behavior of escaped GM salmon, not survival of their offspring. Doesn’t account for why GM genes vanished in the wild population.
D. Migration affects where salmon are sampled but doesn’t explain total absence of GM genes in hundreds tested. Sampling error unlikely with large sample.
E. Even a small number of GM salmon can interbreed and pass on genes. Doesn’t explain how GM genes were detected before but later disappeared.
07 Jul 2025, 21:37
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A. Offspring of genetically modified and wild salmon had significantly lower survival rates in the river environment than offspring of two wild salmon.
> Contender: helps explain why the gm genes were present initially but later went into extinction.
B. Natural predators tend to avoid genetically modified salmon because of differences in their taste.
> wrong; explain the contrary. If true, the gm genes should be widely discoverable.
C. Genetically modified salmon are more likely to escape into ocean environments than remain in rivers.
> weak support. The second study did not specifically mentioned the sample of salmon source. Even then, the genes could have been present in the study.
D. Wild salmon in the river system typically migrate to distant spawning grounds and return only every few years.
> (same as C); but the catch is "every few years", the 2nd study was conducted after three years, so the gm should have should up.
E. Fewer than ten adult GM salmon escaped before the facility was closed.
> wrong; yeah 10 or 1; they could have proliferated.
ChatGPT said:
Your reasoning is thou
> Contender: helps explain why the gm genes were present initially but later went into extinction.
B. Natural predators tend to avoid genetically modified salmon because of differences in their taste.
> wrong; explain the contrary. If true, the gm genes should be widely discoverable.
C. Genetically modified salmon are more likely to escape into ocean environments than remain in rivers.
> weak support. The second study did not specifically mentioned the sample of salmon source. Even then, the genes could have been present in the study.
D. Wild salmon in the river system typically migrate to distant spawning grounds and return only every few years.
> (same as C); but the catch is "every few years", the 2nd study was conducted after three years, so the gm should have should up.
E. Fewer than ten adult GM salmon escaped before the facility was closed.
> wrong; yeah 10 or 1; they could have proliferated.
ChatGPT said:
Your reasoning is thou
07 Jul 2025, 22:04
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- GM salmon escaped and interbred with wild salmon
- First study: GM genes found in juvenile wild salmon
- Three years later: No GM genes found in wild salmon
Option A: Offspring of GM and wild salmon had significantly lower survival rates than offspring of two wild salmon.
This directly explains the discrepancy. If the hybrid offspring (carrying GM genes) had poor survival rates, they would have been present as juveniles in the first study but would have died off by the time of the follow-up study three years later. This would explain why GM genes disappeared from the population.
Option B: Natural predators avoid GM salmon because of taste differences.
This doesn't explain the timeline. If predators avoided GM salmon, the original GM salmon might have survived longer, but this doesn't explain why their offspring disappeared.
Option C: GM salmon are more likely to escape to ocean environments.
This doesn't help explain why GM genes found in juveniles disappeared. The interbreeding had already occurred in the river system.
Option D: Wild salmon typically migrate to distant spawning grounds and return every few years.
This doesn't explain why GM genes would disappear entirely. If anything, this might spread the genes more widely.
Option E: Fewer than ten adult GM salmon escaped.
This doesn't explain why genes that were already detected in juveniles would completely disappear three years later.
The answer is A. If the hybrid offspring had significantly lower survival rates, they would have been present as juveniles in the first study but would have died off before reaching maturity, explaining why no GM genes were found in the follow-up study three years later.
