HBV is mainly spread by

A. blood.
B. blood products.
C. semen.
D. saliva.
E. blood, blood products AND semen.


E.

Biology & Microbiology

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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.

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology

MRSA can be fatal.

Answer the following statement true (T) or false (F)

Biology & Microbiology