Fannie Hesse is credited with giving ________ the idea to use agar as a solidifying agent.

Fannie Hesse is credited with giving ________ the idea to use agar as a solidifying agent.
 
  A) Louis Pasteur
  B) Ferdinand Cohn
  C) Robert Koch
  D) Sergei Winogradsky

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The person who described the wee animalcules was
 
  A) Robert Hooke.
  B) Antoni van Leeuwenhoek.
  C) Louis Pasteur.
  D) Ferdinand Cohn.

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Regarding early life on Earth,
 
  A) microbial life existed for billions of years before plant and animal life.
  B) microbial life existed long before animals but has been around for about the same amount of time as plants.
  C) microbial life, plant life, and animal life all appeared at about the same time.
  D) it is impossible to determine which type of life first appeared.

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Most prokaryotic cells reside
 
  A) on Earth's surface.
  B) in lakes, rivers, and oceans.
  C) in and on nonprokaryotic organisms (including humans and other animals).
  D) in the oceanic and terrestrial subsurfaces.

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Protein catalysts involved in the acceleration of the rate of chemical reactions are called
 
  A) catalytic converters.
  B) growth agents.
  C) evolutionary molecules.
  D) enzymes.