The only antibody not secreted in significant amounts by B cells.
What will be an ideal response?
IgD
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Barophilic bacteria ________.
A. grow only in environments of reduced atmospheric pressure, such as found at high elevation B. tolerate high concentration of barium C. grow at pressures up to 1,100 atm D. require high concentrations of H2S gas for growth
To be precise, global warming is most pronounced at the:
a. poles only b. equator only c. temperate regions only d. temperate regions and poles e. equator and poles
At the beginning of prophase I there are ____
strands of DNA in a developing human sperm cell.
a. 23 b. 92 c. 46 d. half as many (as compared to somatic cell) e. twice as many (as compared to mature sperm)
In addition to several other factors, the overall risks of environmental chemicals depend on genetically determined
variations in the ____ involved in transport, metabolism, and excretion of these chemicals. a. proteins b. body’s oxygen levels c. body’s pH d. ribosomes e. disaccharides