Final answer:
The pair not correctly matched is 'capsule - Escherichia' because Escherichia (E. coli) does not typically have a capsule.
Step-by-step explanation:
The question is asking which pair of bacteria and structure is not correctly matched. An endospore is a dormant, tough, and non-reproductive structure produced by some bacteria in the Bacillus and Clostridium genera. This pair is correctly matched. A capsule is a layer that lies outside the cell wall of bacteria such as Streptococcus, this pair is as well correctly matched. However, Escherichia (E. coli) does not typically possess a capsule, instead, it has a fimbriae and pili outer layer, making the last pair incorrectly matched.
Learn more about Bacterial Structures