The ________ of the microscope holds and allows selection of the objective lenses.

Fill in the blank(s) with the appropriate word(s).


nosepiece

Biology & Microbiology

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After the first exposure to an antigen, a ________ stimulates growth and multiplication of antigen-reaction cells

A) secondary innate immune response B) primary adaptive immune response C) phagocytic immune response D) hyperactive cytotoxic response

Biology & Microbiology

Which of the following statements about emerging viruses is false?  

A.  Emerging viruses are able to "jump" from one species to another. B.  Hantavirus, which causes a hemorrhagic-type fever, originates in deer mice. C.  Ebola is an emerging virus of unknown origins that can have a mortality rate in excess of 50%. D.  The emerging virus SARS is a coronavirus. E.  The stable genome of the SARS virus makes it an unlikely candidate for vaccine development.

Biology & Microbiology

DNA replicates conservatively, which means that one of the two daughter double helices is "old" and the other is "new."

Indicate whether the statement is true or false

Biology & Microbiology

A genetic element which can replicate autonomously when introduced into a cell grown in culture is a ________

Fill in the blank with correct word.

Biology & Microbiology