Systematics And The Phylogenetic Revolution Worksheet With Answer Key - Chapter 23 Page 14
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1948. A group is considered monophyletic if
A.
all members of the group share a common ancestor that is included in the group.
B.
not all descendants of the common ancestor are included.
C.
all members share homoplastic traits.
D.
the group does not contain the most recent common ancestor.
E.
it is the most parsimonious grouping.
49. A group is considered paraphyletic if
A.
all members of the group share a common ancestor.
B.
not all descendants of the common ancestor are included.
C.
the common ancestor of the group is not included in the group.
D.
the group does not contain the most recent common ancestor.
E.
it is the most parsimonious grouping.
50. A group is considered polyphyletic if
A.
all members of the group share a common ancestor.
B.
not all descendants of the common ancestor are included.
C.
all members share homoplastic traits.
D.
the group does not contain the most recent common ancestor.
E.
it is the most parsimonious grouping.
51. Which one of the following statements about molecular clocks is false?
A.
All molecular clocks tick at the same rate.
B.
Molecular clocks can be calibrated using fossil evidence.
C.
The rate of a molecular clock for a given DNA character might vary depending on how
constrained the character is by natural selection.
D.
Ultimately, all molecular clocks depend on the rate of DNA mutation and DNA repair
mechanisms.
52. The phylogenetic species concept (PSC) declares that a group is a species if it
A.
is reproductively isolated from other species.
B.
has evolved one or more of its own derived characters.
C.
looks different than other species.
D.
is allopatric.
E.
has no synapomorphies.
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