Question

fill in the blank using your textbook for answers: 6. the bacterium that causes syphilis is called ______. 7. the domain ____ does not include prokaryotes. 8. nitrogen - fixing bacteria provide other organisms with usable nitrogen in the form of ____. 9. rickettsias are ____ intracellular bacteria. 10. streptococcus is the ______ of bacteria that is responsible for many human diseases.

Explanation:

1. Treponema pallidum is the bacterium that causes syphilis, a well - known fact in microbiology.
2. Eukarya is the domain that does not include prokaryotes; prokaryotes are in the domains Bacteria and Archaea.
3. Nitrogen - fixing bacteria convert nitrogen gas into ammonia which is a usable form of nitrogen for other organisms.
4. Rickettsias are obligate intracellular bacteria, meaning they require a host cell to survive and replicate.
5. Streptococcus is a genus of bacteria responsible for many human diseases such as strep throat.

Answer:

1. Treponema pallidum
2. Eukarya
3. ammonia
4. obligate
5. genus