The plant hormone that promotes cell division
is
a. auxin.
b. gibberellin.
c. cytokinin.
d. abscisic acid.
e. ethylene
C
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Which of the following complicates the generation of an evolutionary tree?
A. vertical gene transfer B. linkage analysis C. changes in mitochondrial DNA D. carcinogens in the environment E. multiple birth (e.g., twins)
The ____ are air-filled respiratory system structures common in insects
a. gills b. tracheal tubes c. lungs d. integumentary surfaces e. air sacs
How do some corals reproduce asexually?
What will be an ideal response?
Atoms of isotopes
a. are electrically unbalanced. b. behave the same chemically and physically but differ biologically from other isotopes. c. are the same physically and biologically but differ from other isotopes chemically. d. have the same number of protons but a different number of neutrons. e. are produced when atoms lose electrons.