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Difficulty: MediumTransitions: Elaboration and Exemplification

Paleontologists studying the fossilization of soft-bodied organisms from the Burgess Shale have noted that specific chemical microenvironments are required to prevent decay before mineralization can occur. ______ extremely low oxygen levels in the sediment can inhibit the activity of aerobic decomposers, allowing delicate structures like gills and antennae to be preserved.

Which choice completes the text with the most logical transition?

  1. A
    Conversely,
  2. B
    Consequently,
  3. Specifically,Answer
  4. D
    Previously,

Answer

Specifically
The correct option is 'Specifically' because the first sentence discusses the general necessity of 'specific chemical microenvironments' for soft-tissue fossilization, and the second sentence details a particular instance of such a microenvironment—namely, low oxygen levels in the sediment that inhibit decomposers. Therefore, the transition logically introduces this specific elaboration.

Step-by-Step Solution

1
Analyze the relationship between the two sentences.
The first sentence introduces a general claim that 'specific chemical microenvironments' are needed to preserve soft-bodied fossils. The second sentence describes a particular condition ('extremely low oxygen levels in the sediment') and explains how it helps with preservation.
Understanding how the second sentence relates to the first is key to identifying the correct transition type.
2
Identify the type of logical connection.
Since the second sentence provides a specific example and elaboration of the general term 'chemical microenvironments' mentioned in the first sentence, an elaboration or exemplification transition is needed.
This helps narrow down the choices to words that signal exemplification or elaboration, such as 'Specifically'.
3
Evaluate the choices against this logical relationship.
'Conversely' introduces contrast, which is incorrect. 'Consequently' indicates cause-and-effect, which is incorrect. 'Previously' indicates a temporal sequence, which is incorrect. 'Specifically' correctly signals that the second sentence details the general concept from the first.
Evaluating each option ensures that distractors are systematically eliminated based on grammatical or logical misalignment.

Key Concept

Transitions: Elaboration and Exemplification
Estimated Time:1m 0s
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Topics

Transitions: Elaboration and Exemplification

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