Magnification
a. is the amount that an object's image is enlarged.
b. is the extent to which detail in an image is preserved during the magnifying process.
c. is the degree to which image details stand out against their background.
d. focuses light rays emanating from an object to produce an image.
b
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The same biologist then takes a sample of acid mine drainage, and finds a new acidophilic archaeon species. Interestingly, these archaeons also require high-salt environments in order to survive. How should this organism be classified?
A. as a euryarchaeote archaeon B. as a crenarchaeote archaeon C. as a nanoarchaeote archaeon D. as a korarchaeote archaeon E. as a thaumarchaeote archaeon
Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few
inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006 . What element does an atom of 210Po change into after it emits an alpha particle? What will be an ideal response?
Consumer fears and uncertainty about the safety of cloned milk and meat have prevented these products from being
sold in stores even though the ____________________ has ruled that such food is safe. Fill in the blank(s) with the appropriate word(s).
Answer the following questions true (T) or false (F)
1. Pleurisy is the accumulation of pus in the lungs. 2. Klebsiella pneumoniae is a leading cause of HAP infections. 3. Macrophages effectively phagocytize and kill Mycobacterium tuberculosis.