The movement of auxin downward from its site of production is referred to as:
a. gravitropism.
b. apical dominance.
c. nonpolar transport.
d. polar transport.
e. turgor movement.
D
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A red blood cell placed in a hypertonic medium will
What will be an ideal response?
External respiration
a. moves carbon dioxide from alveoli into the blood. b. moves oxygen from alveoli into the blood. c. moves oxygen from the blood into alveoli and carbon dioxide in the opposite direction. d. moves oxygen from alveoli into the blood and carbon dioxide in the opposite direction. e. moves both oxygen and carbon dioxide from alveoli into the blood.
A deletion of one base pair that alters the sequence of codons is called a(n)
A. frameshift mutation. B. oncogene. C. substitution mutation. D. transposon. E. carcinogen.
RNA nucleotides are linked by the enzyme _____________.
Fill in the blank(s) with the appropriate word(s).