Exam 15: Bacteria and Archaea

What role do pili serve in the formation of a biofilm?

Match each term describing prokaryotes with ways of obtaining energy and carbon. -a prokaryote that consumes organic matter to obtain energy and carbon

If prokaryotes were unable to convert nitrogen gas into ammonia or nitrate,how would life on Earth be different than it is today?

Anaerobic archaeans living in hydrogen-rich environments may feed on hydrogen and release ________ gas as a by-product.

An experiment is performed to see if an antiseptic will change the skin microbiome.Skin swabs are used before an antiseptic is applied,after the antiseptic is applied,and on the same area 48 hours later.It is observed that the antiseptic drastically reduced the numbers of Staphyloccocus and other bacteria.After 48 hours Staphylococcus reappears as the most common species.What can be inferred from these results?

A prokaryote living in a hot hydrothermal vent deep in the ocean is most likely a(n)________.

Heterotrophic bacteria and archaeans that are decomposers are important in

A prokaryotic cell and a eukaryotic cell are placed in an environment ideal for growth of both cells.After 24 hours it is observed that the prokaryote cell population is significantly higher than the eukaryote cell population.This has occurred because prokaryotes

Beginning with a single bacterium for generation 0,calculate the number of cells present at generation 4.

Match the prokaryotic cell structures with their functions. -allow bacteria to adhere to each other or to a surface in their environment

Professional scientists benefit from citizen science because citizens

Structures produced by bacteria,but not archaeans,that are extremely resistant to boiling and freezing temperatures are

Cells that lack membrane-enclosed organelles and have a single loop of DNA may be

Determine whether a cell structure is found in prokaryotes only,eukaryotes only,or both prokaryotes and eukaryotes. -cytoplasm

In some cases,science is advanced when the public participates in collecting,and sometimes analyzing,data.Name one way in which citizen scientists benefit from this type of collaborative effort.

Eukaryote cells require hours for mitosis to occur.Prokaryotes can often divide into two cells in 10-30 minutes.What cell characteristics explain the difference in the length of time required for division?

Determine whether a cell structure is found in prokaryotes only,eukaryotes only,or both prokaryotes and eukaryotes. -capsule

List three characteristics shared between bacteria and archaea.

Which of the following groups of characteristics defines prokaryotes?

Match the prokaryotic cell structures with their functions. -helps protect disease-causing bacteria from destruction by the immune system