Roots grow downward and shoots grow upward due to
A) cytokinin. B) ethylene. C) gibberellin. D) abscisic acid. E) auxin.
E
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The mechanism for the spread of long interspersed nuclear elements (LINEs) involves some unique features, including _____
A) translation in the cytoplasm of an mRNA that was synthesized in the nucleus B) the nuclear localization of RNA polymerase C) the transport of mRNA from the cytoplasm to the nucleus D) the use of an enzyme that cuts DNA E) the use of RNA polymerase to transcribe an mRNA
An antigen-bearing pathogen that breaches normal flora surface barriers triggers __________ immunity. Fill in the blank(s) with the appropriate word(s)
All evolutionary ancestors of modern humans have been discovered and identified
a. True b. False
Which cause of habitat destruction is fastest-growing and most destructive?
A. Conversion to agriculture B. Urbanization C. Mining and quarrying D. Dams E. Deforestation F. Draining wetlands