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Zorluk: KolayIdentifying Primary Purpose and Main Idea

Passage:
While early marine biologists posited that hydrothermal vent ecosystems relied exclusively on chemical compounds emitted directly from Earth's crust to sustain life, recent deep-sea explorations have revealed a more complex ecological dynamic. Researchers discovered that photosynthetic energy from surface waters occasionally reaches these abyssal zones via falling organic debris, known as marine snow. This external organic input significantly supplements the primary chemosynthetic production of vent bacteria, indicating that hydrothermal ecosystems are not entirely isolated from surface-driven biological processes.

Statement: The primary purpose of the passage is to argue that hydrothermal vent ecosystems depend entirely on chemical emissions from Earth's crust without any influence from surface waters.

Cevap: Cevap

Cevap

False
The statement accurately describes the outdated hypothesis mentioned at the start of the passage, but fails to capture the passage's primary purpose, which is to demonstrate that vent ecosystems receive supplementary surface inputs.

Adım Adım Çözüm

1
Identify the author's thesis and structural pivot in the passage.
The passage begins with an old belief ('relied exclusively') and pivots ('recent deep-sea explorations have revealed') to show that surface organic matter ('marine snow') also feeds these ecosystems.
Structural transition words indicate that the author is updating, rather than affirming, the traditional exclusive dependence view.
2
Compare the statement to the primary purpose of the passage.
The statement asserts that the passage defends exclusive crust dependency, which directly contradicts the author's main point that surface inputs supplement vent life.
The statement misrepresents the discredited initial premise as the main objective of the text.

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Identifying Primary Purpose and Main Idea
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Identifying Primary Purpose and Main Idea

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