What is the function of normal biota of the respiratory tract?
A. Provides antibodies
B. Microbial antagonism
C. Competes with pathogens for resources and space
D. Both [competes with pathogens for resources and space] and [microbial antagonism] are correct.
E. All of these three functions are correct.
Answer: D
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Based on what you know of ATP's chemistry, which of the following might be most likely to have possible similar uses in energy-management processes?
A. lysine (amino acid) B. phospholipids C. guanine nucleotide D. steroids E. potassium ions (K+)
Extant microorganisms are organisms from the fossil record that are no longer present on Earth today.
Answer the following statement true (T) or false (F)
A trait that is adaptive in one context and later turns out to have adaptive value in a rather different
context is called
a. paedomorphosis. b. anagenesis. c. cladogenesis. d. exaptation. e. endemic.
Acylhomoserine lactones used in quorum sensing regulate their own synthesis by a(n) ________ system.
A. riboswitch B. antisense C. autoinduction D. catabolite repression