Lecture 1 review Flashcards
Evidence indicates that the Earth was _______ until about 2 billion years ago (meaning there was no oxygen in the atmosphere).
Anoxic
What anatomical parts make up the “gut”?
Mouth to anus
Microorganisms that exist in nature in populations of interacting assemblages are called:
microbial communities
Who was the first to discover bacterial endospores?
Historically, who identified bacterial endospores and established the field of Bacteriology?
Cohn
Which of the following was the leading cause of death in 1900?
Flu/pneumonia
Microbiology revolves around 2 themes. Select the two correct themes:
Applying our understanding of life processes is ways that benefit humans
Understanding basic life processes
What does this equation allow you to calculate?
N = N02n
The final number of cells after it has been cultured for a period of time
What is the major environmental factor that controls microbial growth?
temperature
The Gram stain is identified as a differential stain because:
The stain is used to differentiate between two different types of organisms
A chemolithotroph in an organism that creates energy from _
Oxidizing inorganic compounds
Which of the following is NOT a type of microscopy?
oil-contrast
The benefit of phase-contrast microscopy is that it:
improves the contrast of a sample without the use of a stain
