HBV is mainly spread by
A. blood.
B. blood products.
C. semen.
D. saliva.
E. blood, blood products AND semen.
E.
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Stomatal opening requires each of the following conditions, except
A. expenditure of energy. B. a reduction of turgor in the guard cells. C. water entering the guard cells by osmosis. D. a lower water potential in the guard cells. E. pumping of potassium ions into the guard cells.
The serial endosymbiosis hypothesis states that the origin of mitochondria and chloroplasts was the
result of a mutually advantageous symbiotic relationship between two eukaryotic organisms. ___________ Indicate whether the statement is true or false.
Select the best response to the question. All of the following are functions of the cell membrane EXCEPT: A) maintaining cell shape. B) allowing waste removal from the cell
C)allowing nutrients into the cell. D) protecting the cell from the environment.
MRSA can be fatal.
Answer the following statement true (T) or false (F)