Bacteria used in wastewater treatment include those that can convert ammonia and nitrite to nitrate, decreasing the reduced nitrogen content of the sewage. These bacteria, such as Nitrosomonas spp., often belong in:
a. Betaproteobacteria.
b. Gammaproteobacteria.
c. Alphaproteobacteria.
d. Deltaproteobacteria.

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

Number and variety of living organisms includes genetic, species, and ecological types

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?