Which of the following is (are) problematic when the goal is to construct phylogenies that accurately reflect evolutionary history?
A) polyphyletic taxa
B) paraphyletic taxa
C) monophyletic taxa
D) polyphyletic taxa and paraphyletic taxa
D
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Which chromosomal mutation will cause Williams syndrome?
A. duplication B. deletion C. trisomy D. translocation E. inversion
The thyroid glands secrete calcitonin.
a. true b. false
Which of the following processes could a scientist use to make an amount of DNA that is large enough study?
A.) polymerase chain reaction B.) genetic engineering C.) bioinformatics D.) gel electrophoresis
What is a hallmark of passive transport across cell membranes?
a. It requires the use of ATP. b. It occurs along an electrochemical gradient. c. It cannot occur without assistance from an integral membrane protein. d. It occurs along an electrochemical gradient, and may involve the use of transport proteins. e. It may involve the use of transport proteins.