Which of the following is true of the non-cyclic portion of vitamin A?
A) It contains 4 double bonds, all in the cis configuration.
B) It contains 4 double bonds, all in the trans configuration.
C) It contains 4 double bonds, which alternate cis, trans, cis, trans.
D) None of the above is true.
B
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The process of concentrating populations in cities is called ________
Fill in the blank(s) with the appropriate word(s).
What theory has the central thesis that all present-day organisms are related and that they have descended with modifications from organisms that lived in the past?
A)theory of relativism B)best-fit theory C)theory of organic evolution D)unifying theory E)theory of uniformitarianism
All the organisms and their physical and chemical environment within a specific area best describe ________
A) ecosystems B) biomes C) ecological communities D) populations E) the biosphere
By definition, brackish water has a higher salinity than brine
Indicate whether the statement is true or false