Read the sentence below concerning astrobiological research. Based on the explicit continuation structural signal in the sentence, enter a word or phrase that logically completes the blank.
Answer:The discovery of intact organic molecules within subterranean basalt deposits did not merely suggest the possibility of microbial life in extreme environments; 【indeed】, by confirming active metabolic pathways miles beneath the seafloor, the study forced astrobiologists to broaden their criteria for planetary habitability.
Answer
indeed (or an equivalent intensifying continuation transition such as 'in fact', 'furthermore', or 'moreover')
The sentence follows an escalating continuation pattern initiated by 'did not merely'. The second independent clause enhances the scope of the discovery from a mere possibility to a confirmed finding that alters scientific criteria. An intensifying continuation word such as 'indeed' or 'furthermore' correctly bridges the two clauses while maintaining logical coherence.
Step-by-Step Solution
Key Concept
Interpreting Continuation and Causal Structural Signals
Estimated Time:1m 0s