There are two groups of bacteria which live in the Great Salt Lake: Halobacterium and Halococcus. The Great Salt Lake's average salinity is around 13%. What class of microbes do the Halobacterium and Halococcus species belong to?

Which of the following statements is true?

a. Archaea and bacteria have identical membrane lipids

b. The cell walls of archaea lack peptidoglycan

c. Prokaryotes have low levels of genetic diversity

d. No archaea are capable of using CO₂ to oxidize H₂, releasing methane

An organism that requires an environment of high salt concentration describes an Extreme…

A cell is most likely to experience plasmolysis (contraction or shrinking of the cell) when…

All organisms have specific environmental conditions in which they thrive. Most organisms cannot live in extremely salty environments. If a bacterium that normally lives in a fresh water environment is placed in an environment that is excessively salty, what will happen?

Methanopyrus kandleri is a species of archaea that lives in the hydrothermal vents of the Pacific Ocean. This species' optimal temperatures are between 100-122 ºC. This species also does not require oxygen, as it survives off of hydrogen gas and releases methane gas. What environmental classifications would this archaeal species fit into?

Acidobacterium capsulatum is a species of bacteria that grows better in the absence of oxygen but can survive if oxygen is present. This species of bacteria also thrives in soil and water with a pH between 3.0 and 6.0. What environmental classifications would this bacterial species fit into?