Epithelial tissues have one free surface or edge known as the ________ surface.
A. basement.
B. apical.
C. matrix.
D. attached.
Answer: B. apical.
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The discrepancy between the number of microbial cells observed by microscopic examination and the number of colonies that can be cultivated from the same natural sample may be due to ________.
A. microbial motility B. incorrect culture conditions C. nonviable organisms D. nonviable organisms and incorrect culture conditions
AUGCGUCCA
The sequence of amino acids specified by this mRNA is a. serine – histidine – lysine. b. methionine – arginine – proline. c. methionine – alanine – serine. d. valine – arginine – leucine. e. none of these.
In which of the following ways has climate change impacted weather patterns in the United States?
A. Average temperatures have increased up to 1.8°F; however, these changes have been very regional, with some areas seeing increasing temperatures and others seeing decreasing temperatures. B. Average precipitation has increased by 4%; however, this has been a very regional change, with some areas seeing significant increases in rainfall and other areas seeing significant decreases in rainfall. C. Severe weather events, including droughts and flooding, have decreased in frequency. D. Geological events, including volcanoes and earthquakes have increased in frequency.
Select all parts of the human central nervous system.
A. vertebrae B. spinal cord C. brain D. nerves E. ganglia