The term prokaryotes refers to which of the following?
A. very small organisms
B. unicellular organisms that have no nucleus
C. multicellular organisms
D. cells that resemble animal cells more than plant cells
Ans: B. unicellular organisms that have no nucleus
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Are dogs a product of biotechnology?
a. no, because they coevolved with humans b. yes, because they were and are selected for specific traits and behaviors c. no, because they interact socially with humans d. yes, because humans have been studying and manipulating their learned behaviors
what is the etiology of each of the following: typhoid fever? cholera? dysentery?
What will be an ideal response?
When hemoglobin binds hydrogen ions it is acting as a(n)
a. neutralizer. b. buffer. c. acid. d. base. e. cation.
_____ are toxic proteins secreted by pathogenic bacteria, whereas _____ are components of the outer membrane of gram-negative pathogens
a. endotoxins...phosphotoxins b. endotoxins...botulinum toxins c. toxozymes...endotoxins d. exotoxins...enterotoxins e. exotoxins...endotoxins