Molecular systematics might examine all of the following types of data EXCEPT ________
A) proteins
B) DNA sequences
C) amino acid sequences
D) anatomical features
D
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The phase at the end of an action potential when the membrane potential becomes more negative than it is at rest is the ________ phase.
A) threshold B) depolarizing C) repolarizing D) hyperpolarizing E) refractory
Escherichia coli bacteria in human colons provide humans with vitamin K in return for a steady food supply and warm place to live. This is an example of a ____ relationship
a. mutualistic b. predatory c. commensal d. parasitic e. habitat
The __________ is the pelvic girdle, pectoral girdle, and paired limbs. Fill in the blank(s) with the appropriate word(s)
This figure demonstrates a DNA repair mechanism. What property of DNA makes such repair possible in DNA but not RNA?
a. DNA uses deoxyribose instead of ribose. b. DNA uses thymine instead of uracil. c. DNA is a double helix. d. DNA is more reactive than RNA.