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Below are descriptions of real-world environments. Match the type of prokaryote would most likely dominate each environment. 

During a debate in class, one student argues: “Bacteria can’t possibly evolve as fast as eukaryotes because they don’t reproduce sexually. Without meiosis and fertilization, there’s no way to generate enough genetic variation.” Which statement would BEST correct this misconception?

In which of the following does the microbe never get completely eliminated, and exists in host tissues held in check by body defenses without causing signs and symptoms?

The term pathogen refers to 

The actual number of pathogenic microbes it takes to establish infection is called the infectious dose 50 (ID50)

Neisseria gonorrhoeae has antigenic variation which means

Central tolerance indicates that as lymphocytes mature, the ones that do not recognize self molecules 

Once a B cell is activated and proliferates into a clone, some differentiate into 

One T cell contains receptors for numerous different antigens.

The type of cell that stops the immune system from overreacting and responding to harmless substances is the