Downward bending of a seedling root can be blocked
by
a. moving it to a dark room.
b. auxin transporters.
c. auxin transport inhibitors.
d. mutations in genes that code for auxin transport
proteins.
e. auxin transport inhibition and mutations in genes
that code for auxin transport proteins.
Answer: e
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Rods are
a. sensitive to red light. b. sensitive to green light. c. sensitive to blue light. d. relatively insensitive to dim light. e. sensistive to dim light.
____________________ could one day be used to screen an individual’s genome to reveal genetic predispositions to
diseases. Fill in the blank(s) with the appropriate word(s).
The 5' end of a DNA molecule can be chemically distinguished from the 3' end because there is a(n) ________ group at the 5' end and a(n) ________ group at the 3' end
A) amine; carboxyl B) phosphate; sulfate C) hydroxyl; hydrogen D) phosphate; hydroxyl E) amine; hydroxyl
Who found and named Pithecanthropus?
A. Ernst Haeckel B. Eugene Dubois C. Rudolf Virchow D. Davidson Black E. G. Elliot Smith