Question 1

The term "extremophiles" is sometimes used to describe ________ based on the environments in which they live.

Accepted Answer

A)  archaeans 
B)  bacteria 
C)  prokaryotes 
D)  eukaryotes

Question 2

Archaea are able to live in extreme environments because they have

Accepted Answer

A)  simpler cells than eukaryotes. 
B)  evolutionary adaptations that other organisms lack. 
C)  a thick capsule. 
D)  flagella that other organisms lack.

Question 3

Archaeans found in deep-sea hydrothermal vents would be expected to

Accepted Answer

A)  use carbon dioxide in photosynthesis. 
B)  obtain energy from inorganic chemicals. 
C)  produce oxygen gas as a by-product. 
D)  obtain energy from sunlight.

Question 4

A citizen scientist documenting dates when migratory birds arrive in an area are participating in data ________.

Accepted Answer

The answer of A citizen scientist documenting dates when migratory...

Question 5

After boiling water for a short period of time,the water is checked for the presence of living cells.When it is determined that no active,living cells are present,the water is used to make agar,a media used for bacterial growth.Within 48 hours there are numerous colonies of cells growing on the agar.What type of prokaryote is growing? Why was the organism not detected in the water?

Accepted Answer

The answer of After boiling water for a short period...

Question 6

A water sample is taken from a mineral hot spring.The water is found to be highly acidic.Which of the following organisms is MOST likely to be living in this sample?

Accepted Answer

A)  a eukaryotic rotifer 
B)  a bacterium typically found living in belly buttons 
C)  an archaean 
D)  a multicellular eukaryote

Question 7

If a professional scientist is trying to build an extensive database of bacterial swabs from humans in all parts of the world,what is the most cost-effective way to increase the number of samples collected in a one-year time period?

Accepted Answer

A)  Train citizens to collect samples from the public. 
B)  Hire more researchers to travel around the world. 
C)  Send a single professional scientist to locations throughout the world. 
D)  Pay for citizens around the world to travel to a central laboratory where samples will be collected.

Question 8

Citizen science projects contribute to scientific research by the public

Accepted Answer

A)  collectively forming hypotheses for experiments. 
B)  designing and carrying out experiments. 
C)  participating in the collection of data. 
D)  peer-reviewing professional research.

Question 9

A biofilm within a medical device is formed by several bacteria species.A bacterium that is part of this biofilm has a mutation that prevents the formation of the slimy secretion used to protect a developing biofilm.Will this mutation prevent the formation of the biofilm?

Accepted Answer

The answer of A biofilm within a medical device is...

Question 10

Many bacteria have a shorter generation time at warmer temperatures.Why do food safety guidelines recommend rapidly cooling leftover foods and maintaining them at refrigerator temperatures?

Accepted Answer

A)  Prokaryotes are incapable of reproducing at refrigerator temperatures. 
B)  Many bacteria reach disease-causing levels rapidly when food is warm. 
C)  Refrigerator temperatures reduce the amount of oxygen available for aerobic bacteria. 
D)  Prokaryotes require light for reproduction and the inside of a refrigerator is dark.

Question 11

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

Accepted Answer

A) prokaryotes only 
B) eukaryotes only 
C) both prokaryotes and eukaryotes

Exam 15: Bacteria and Archaea