The rate of division of most vertebrate cells is least likely to be influenced by which of the following?
A. Contact with other cells
B. The availability of nutrients
C. Compounds that inhibit protein synthesis
D. The cell's photoperiod
E. The temperature of the organism
Ans: D. The cell's photoperiod
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Each immunoglobulin or TCR interacts with a single antigen, but MHC proteins can interact with more than one antigen
Indicate whether the statement is true or false.
An important intestinal pathogen generally acquired from contaminated food or water is
A) Clostridium perfringens. B) Mycobacterium tuberculosis. C) Ebola virus. D) Escherichia coli O157:H7.
An important bacterial mediated process that occurs on the surface of plant roots is called ________ nitrogen fixation.
What will be an ideal response?
Plaque is caused by many organisms but one of the
main causes is a. fungal chitin. b. protistan lipids. c. algal alginates. d. extracellular products of bacteria e. all of these.