Respond to statements 3640 with reference to the four
microevolutionary processes listed below.
a. mutation
b. gene flow
c. genetic drift
d. natural selection
M 36. erodes species cohesion
E 37. original source of alleles
M 38. preserves species cohesion
D 39. preserves or erodes species cohesion depending on
environmental pressures
D 40. results from differential survival and reproduction
Question 2Matching. Choose the most appropriate response for
each statement.
1. ___ cladogenesis
2. ___ species
3. ___ isolating mechanism
4. ___ sympatric speciation
5. ___ polyploidy
6. ___ punctuation model
7. ___ mass extinction
8. ___ allopatric speciation
9. ___ adaptive radiation
A. geographic separation of two
populations accompanied by gradual
speciation
B. encompasses all of those actually or
potentially interbreeding
populations that are reproductively
isolated from other such groups
C. a population occupying the same
home range undergoes reproductive
isolation
D. morphological changes compressed
into brief periods followed by
speciation
E. branching pattern of speciation
F. catastrophic, global loss of species
G. a burst of microevolutionary activity
within a lineage
H. inheritance of three or more sets of
chromosomes
I. prevents gene flow between
populations
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