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Difficulty: EasyPart-to-Whole Rhetorical Function

In botany, researchers have examined the role of mycorrhizal networks, which are underground fungal webs that connect plant roots. Dr. Charles Chen demonstrated that these networks allow mature trees to share surplus sugars with younger seedlings. This resource sharing helps seedlings survive in shaded forest understories where sunlight is scarce. Thus, the fungal network acts as a crucial support system that increases the survival rate of the entire forest community.

Which choice best describes the function of the underlined sentence in the text as a whole?

  1. A
    It provides a general definition of mycorrhizal networks to introduce the topic of the passage.
  2. B
    It states the main conclusion of the passage regarding the overall survival rate of forest communities.
  3. It presents a specific research finding to illustrate how the networks facilitate resource sharing between plants.Answer
  4. D
    It offers an explanation for why mature trees produce more surplus sugars than younger seedlings do.

Answer

The correct answer is the option stating that the underlined sentence presents a specific research finding to illustrate how the networks facilitate resource sharing between plants.
The correct option describes the rhetorical function of the underlined sentence, which presents a specific finding (mature trees sharing sugar with seedlings) that illustrates how mycorrhizal networks facilitate resource sharing.

Step-by-Step Solution

1
Read the entire passage to identify the main topic and argument.
The passage discusses the cooperative role of mycorrhizal networks in helping forest communities survive through resource sharing.
Understanding the whole text is necessary to determine how the specific part relates to it.
2
Analyze the underlined sentence to identify its specific content.
The underlined sentence presents Dr. Charles Chen's finding that mature trees share surplus sugars with seedlings via mycorrhizal networks.
This isolates the function of the specific part under review.
3
Determine the relationship between the underlined sentence and the surrounding sentences.
The sentence provides a specific example of resource sharing (sharing sugars) that explains the general claim that the networks connect plant roots and support the forest.
This establishes the logical connection between the part and the whole.

Key Concept

Identifying how a specific sentence or claim functions rhetorically within a larger passage to support or illustrate the author's main point.
Estimated Time:45s
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Topics

Part-to-Whole Rhetorical Function

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