The technique of "backing down" the purse seine net decrease the number of dolphins caught in it
Indicate whether the statement is true or false
T
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The photosynthetic membranes of the green sulfur bacteria are called ________.
A. chlorocytes B. chloroplasts C. chlorophylls D. chlorosomes
In general, which of the following is the best way to distinguish males from females?
a. Males are more brightly colored. b. Males produce motile gametes. c. Males are larger. d. Males are more aggressive. e. All of the above are correct
Water molecules stick to other water molecules because
A) water molecules are neutral, and neutral molecules are attracted to each other. B) hydrogen bonds form between the hydrogen atoms of one water molecule and the oxygen atoms of other water molecules. C) covalent bonds form between the hydrogen atoms of one water molecule and the oxygen atoms of other water molecules. D) the oxygen atoms of adjacent water molecules are attracted to one another.
Morgan's student Sturtevant demonstrated that the recombination frequencies between a series of linked genes is additive. Examine the following recombination data from Sturtevant, and determine the proper order of the genes on the Drosophila X chromosome. Assume y is in the 0.0 position.Gene 1 Gene 2 Recombination frequencyyellow(y) vermilion(y) 0.322vermilion miniature(m) 0.030white(w) vermiliom 0.297yellow white 0.010white miniature 0.337
A. y w v m B. y m v w C. y w m v D. y m w v