11. Calcium required for bacteria because A. It stabilizes the : 1180172

11. Calcium required for bacteria because A. It stabilizes the : 1180172.

 

 

11.  Calcium is required for bacteria because  
A.  It stabilizes the cell wall
B.  It stabilizes the ribosomes
C.  It stabilizes the nucleoid
D.  It maintains cellular pH
E.  It makes strong bones

 


 

12.  Growth factors  
A.  Are inorganic
B.  Are synthesized by organism
C.  Contain elemental oxygen
D.  Cannot be synthesized by the organism
E.  All of the choices are correct

 


 

13.  An organism that uses CO2 for its carbon needs and sunlight for its energy needs would be called a/an  
A.  Heterotroph
B.  Photoautotroph
C.  Chemoheterotroph
D.  Saprobe
E.  Halotroph

 


 

14.  The term phototroph refers to an organism that  
A.  Uses CO2 for its carbon source
B.  Must obtain organic compounds for its carbon needs
C.  Gets energy from sunlight
D.  Gets energy by oxidizing chemical compounds
E.  Does not need a carbon source

 


 

15.  The term chemotroph refers to an organism that  
A.  Uses CO2 for its carbon source
B.  Must obtain organic compounds for its carbon needs
C.  Gets energy from sunlight
D.  Gets energy by oxidizing chemical compounds
E.  Does not need a carbon source

 


 

16.  The methanogens, producers of methane gas, require environments that  
A.  Have sunlight
B.  Are very acidic
C.  Have abundant oxygen and CO2
D.  Are extremely cold
E.  Are anaerobic with hydrogen gas and CO2

 


 

17.  Organisms that feed on dead organisms for nutrients are called  
A.  Saprobes
B.  Parasites
C.  Autotrophs
D.  Lithoautotrophs
E.  Phototrophs

 


 

18.  The type of photosynthesis that does not produce oxygen  
A.  Occurs in cyanobacteria
B.  Does not require CO2 as a reactant
C.  Occurs in purple and green sulfur bacteria
D.  Does not require sunlight
E.  Occurs in algae and plants

 


 

19.  Archea as a group are not pathogens. This is because  
A.  They evolved without mammals
B.  Mammals evolved special defenses against them
C.  Mammalian hosts do not meet their environmental requirements
D.  They are out competed by natural flora
E.  None of the choices are correct

 


 

20.  Aerobic respiration is an example of  
A.  Photosynthesis
B.  Methanoheterophy
C.  Photoheterotrophy
D.  Chemoheterotrophy
E.  Photo autotrophy

 


 

11. Calcium required for bacteria because A. It stabilizes the : 1180172

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