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premise: settlers planted special variety of sunflower 10000 yr ago. all sunflower on island are from that variety.
conclusion: by studying today's variety, we can know about that orginal variety.
evidence: the wild plants have not been selectively cultivated over the years as the farmed plants have.

Pre-thinking: what if selectively not cultivated, then we would have lost the original variety some where in between. now that we have cultivated then properties of orginal one are carried on in current variety.

B. The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants. --- what if this is not true. what good it will bring by studying these plants. we will know nothing about orginal variety. straight thi is the right answer.

D. The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety. --- even if few changes we can know about the original variety. what if we negate it. conclusion is as it is. this can't be the answer.
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Quote:
Botanist: On the remote island of Tropica, it is known that early settlers brought a special variety of sunflower plant to cultivate on their arrival over 10,000 years ago. All of the sunflowers on the island today, both wild and farmed, have descended from that original variety. By studying today’s wild sunflower plants on the island of Tropica, we can learn much more about that original variety of sunflower because the wild plants have not been selectively cultivated over the years as the farmed plants have.


Quote:
(C) The climate on the island of Tropica has not changed significantly over the past 10,000 years.

My logic was. - If the climate did change significantly, then my conclusion, i.e. - we can learn a lot about original variety based on Wild Cultivation, which doesn't have any special cultivation associated with it - falls apart and hence I chose C.
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Isn't option B kinda sufficient statement? In assumption we look for necessary statement.
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Isn't option B kinda sufficient statement? In assumption we look for necessary statement.
anshumanmalliwal In assumption questions that require necessary assumptions, assumptions can be BOTH necessary AND sufficient – they don't have to be one or the other.
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conclusion- by studying todays wild sunflower plant, we can learn much more about that original variety of sunflower
Reason- wild plant haven't been selectively cultivated over the years as the farmed plants have.
early settlers brough special variety of sunflower with them.
all of the sunflower on island today have descended from original variety.

early settlers- brough sunflower plant- current plant- descended from original plant-study wild plant- learn more about original variety of sunflower.

they are assuming that nothing in plant has been changed because of environmental situations. they are all same.
A not concerned with other varieties.
B perfect. if they are more similar and if they havent been used much then they havent been exposed to much of the changes. then they can definitely represent the older plant precisely.
C climate is not gonna change much.
D even if it led to few changes we can still find about original plant.
E what about the others. irrelevant.


guerrero25
Botanist: On the remote island of Tropica, it is known that early settlers brought a special variety of sunflower plant to cultivate on their arrival over 10,000 years ago. All of the sunflowers on the island today, both wild and farmed, have descended from that original variety. By studying today’s wild sunflower plants on the island of Tropica, we can learn much more about that original variety of sunflower because the wild plants have not been selectively cultivated over the years as the farmed plants have.

The botanist’s argument depends on which of the following assumptions?


(A) There were not other varieties of sunflowers on Tropica when the settlers first arrived on the island.

(B) The wild sunflower plants on the island of Tropica today are more similar to the original variety than today’s farmed plants.

(C) The climate on the island of Tropica has not changed significantly over the past 10,000 years.

(D) The selective cultivation of farmed plants over the past 10,000 years has led to few if any significant changes from the original variety.

(E) Some wild plants have mutated dramatically over the past 10,000 years.


Show SpoilerVERITAS PREP OFFICIAL EXPLANATION
The botanist’s argument makes one very important (but easily overlooked) assumption: over the past 10,000 years, wild sunflowers have remained more similar to the original variety than the selectively cultivated farmed sunflowers have. What if wild sunflowers have evolved dramatically but the selective cultivation has produced very few changes from the original variety? In the original argument it is easy to assume that selectively cultivated = more changes but that is not necessarily the case.

Answer choice (B) removes this possibility by guaranteeing that indeed the wild plants are more similar and thus improves the botanist’s argument.

(A) is irrelevant because you are told in the argument that all of the sunflowers on the island today have descended from the one variety brought by the settlers.

(C) is incorrect because you do not know how a change in climate might have affected the sunflowers. Maybe the change caused major mutations in the wild sunflowers but maybe not.

(D) weakens the argument by suggesting that the changes in farmed plants were not significant (the argument assumes that they were) .

(E), with the word “some”, is problematic because it might only refer to one plant, but even if did refer to many, this statement would also weaken the argument.
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