Which one of the following cell types typically divide throughout one's life?
A) osteocytes
B) stem cells in the bone marrow
C) neurons
D) muscle cells
E) liver cells
B
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Innate immunity is
a. the body’s first line of defense. b. the body’s second line of defense. c. the body’s third line of defense. d. involved with the production of antibodies. e. associated with all of these.
T cells are responsible for directly manufacturing antibodies
Indicate whether this statement is true or false.
Saccharomyces cerevisiae is commonly referred to as
A. common bread mold. B. the "false morel." C. the "death angel." D. bread yeast. E. an antibiotic producer.
In a graph that plots prey population (Nprey) on the x-axis against the number of predator offspring produced per unit of time on the y-axis, the slope represents the
A) efficiency of predation (c). B) efficiency with which food is converted into predator population growth or reproduction (b). C) predator population growth rate (r). D) the rate of increase in prey availability.