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Difficulty: MediumTransitions: Addition and Similarity

Read the passage and fill in the blank with the transition word or phrase that best completes the passage by establishing a logical relationship.

Answer:In deep-sea hydrothermal vent ecosystems, giant tube worms (Riftia pachyptila) rely on a symbiotic relationship with chemosynthetic bacteria to survive in the absence of sunlight. 【similarly】, vent clams (Calyptogena magnifica) house closely related endosymbionts in their gill tissues to obtain nutrition.

Answer

Similarly (or likewise)
The passage discusses two separate organisms that rely on analogous symbiotic mechanisms to live in hydrothermal vent ecosystems. Because the second sentence presents a parallel situation to the first, a transition of similarity like 'similarly' or 'likewise' is logically required to connect them.

Step-by-Step Solution

1
Analyze the relationship between the two sentences in the passage.
The first sentence explains that giant tube worms survive by partnering symbiotically with chemosynthetic bacteria. The second sentence describes how vent clams also use a symbiotic partnership with related bacteria to get nutrition.
Determining how the sentences connect conceptually is the first step to choosing the correct transition.
2
Determine the logic type of the transition.
Both sentences describe parallel examples of marine species using bacterial symbiosis in deep-sea vent environments. The transition must point out a similarity between these two cases.
Matching the correct conceptual category prevents using contrasting or cause-and-effect links.
3
Select a fitting transition word.
'Similarly' or 'likewise' fits the context and maintains the passage's formal tone.
These transition words establish the intended analogical relationship between the two sentences.

Key Concept

Transitions of similarity link two analogous ideas, cases, or examples to highlight their commonalities.
Estimated Time:1m 0s
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Topics

Transitions: Addition and Similarity

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