15. The Evolution of Microbial Life

Which domains of life are classified as prokaryotes?

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?

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?

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

Which of the following is not a common feature shared by all types of cells?

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?

If you wanted to increase your chances of obtaining a member of Archaea (rather than a member of another domain), which would be the best site to obtain a sample?

In bacteria, DNA will be found in _______________.

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

Which of the following is/are a primary difference(s) between all prokaryotes and eukaryotic cells?

Many species of Archaea are known to thrive in environments in which most living things would not survive. We call these Archaea… 

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?

You isolate a cell with the following characteristics:(1) no nucleus, (2) a cell wall, and the cell is (3) 2 μm in size. This cell could be a/an: