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Soru

Zorluk: OrtaCentral Ideas

When a whale dies, its carcass sinks to the abyssal ocean floor, creating a localized, highly concentrated resource oasis known as a whale fall. In these nutrient-poor depths, a single whale fall can support a complex succession of ecological communities for decades. Initially, mobile scavengers like hagfish strip the soft tissue. Over time, opportunistic macroinvertebrates colonize the remaining bones and surrounding organic-rich sediment. Finally, sulfophilic bacteria decompose the bone lipids, producing hydrogen sulfide that fuels chemoautotrophic organisms. Thus, rather than being mere biological debris, whale falls function as critical hubs of biodiversity, facilitating the survival and dispersal of specialized deep-sea species that would otherwise perish in the barren benthic environment.

Which choice best states the main idea of the text?

  1. A
    Deep-sea ecosystems are entirely dependent on organic matter sinking from the ocean surface to survive.
  2. Whale falls provide essential nutrient oases that sustain diverse and specialized deep-sea communities over long periods.Cevap
  3. C
    Hagfish and other mobile scavengers are the primary species responsible for dispersing nutrients from whale falls throughout the ocean.
  4. D
    Specialized deep-sea species would likely migrate to shallower waters if whale falls became less frequent.

Cevap

Whale falls provide essential nutrient oases that sustain diverse and specialized deep-sea communities over long periods.
The correct answer accurately captures the main idea by summarizing how whale falls act as rich nutrient sources that support diverse, specialized ecological communities over decades on the barren ocean floor.

Adım Adım Çözüm

1
Identify the primary topic of the passage.
The passage describes the process of ecological succession on whale carcasses (whale falls) on the ocean floor.
Understanding the topic helps isolate the core subject matter from supporting details.
2
Locate and analyze the author's concluding claim.
The final sentence highlights that whale falls function as critical hubs of biodiversity, facilitating the survival of specialized deep-sea species in an otherwise barren environment.
The conclusion of such passages often contains the primary thesis or central idea summarizing the details presented.
3
Evaluate the options against the main claim.
The option stating that whale falls provide essential nutrient oases to sustain diverse communities over long periods is the only choice that accurately and comprehensively summarizes the text.
An accurate summary must reflect the main point of the passage without overgeneralizing or introducing speculative assertions.

Anahtar Kavram

Central Ideas
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Konular

Central Ideas

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