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Bacteria in the genus Rhodobacter are purple bacteria that usually get their energy from sunlight and carbon from organic molecules. If there is no sunlight, the bacterium can get energy from organic molecules.  Recently, bioengineers have begun to use some species of Rhodobacter to reduce the offensive smell from hog farms by encouraging the bacterium to grow in the manure ponds.  As the bacteria grow, they consume the organic molecules that are responsible for the offensive odor. Which of the following terms can accurately be used to describe this bacterium and its use? Select all that apply.  

Acidithiobacillus thiooxidans is a species of bacterium that is commonly found in soils, caves, and sewer pipes. Acidithiobacillus thiooxidans gets its energy from sulfur-based compounds and its carbon from CO2.  It requires oxygen to convert sulfur-based compounds to energy .  Acidithiobacillus thiooxidans is therefore classified as a

    Based on this image, these bacteria are classified as _______________.  They have a thick layer of peptidoglycan and a relatively simple cell wall so they are also classified as being ______________.

Sulfur is in the same column of the periodic table as oxygen, but has low electronegativity.  Compared to water molecules, molecules of H2S will have:

Which of the following statements best describes the conditions on early Earth and its impact on the evolution of life.

   This image shows a fatty acid. This is an example of a(n) ___________________ fatty acid and a fat comprised of only this type of molecule is expected to be _____________ at room temperature  

You are collecting biological samples and bringing them back to the lab to determine the diversity of organisms present in the sample. Most of the species are already described, but you find one that you think is a new species. It is a prokaryote. Which of the following would you find if it is a member of the Archaea, not a bacteria?

Which of the following statements is true of two sister chromatids that are joined at the centromere prior to mitosis?

Which of the following is true of crossing over during cell division?

You took a sample of water from a stream that you crossed while hiking in the Allegheny Mountains.  Analysis of the organisms living in the water include an organism that is a heterotrophic decomposer with cell walls made of cellulose and flagella with hair-like structures.  This organism is most likely a ___________________.