Chapter 22 – The Origin of Species
Clarify Question
•
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•
What type of thinking is required?
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What do you already know about sympatric and allopatric speciation?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
Chapter 22 – The Origin of Species
more desirable result?
28. The sunflower species Helianthus anomalus is thought to have been formed by
hybridization between the sunflower species H. petiolaris and H. annuus because it contains a
set of chromsomes from both parental species. H. anomalus is most likely an example of
instantaneous speciation through
Chapter 22 – The Origin of Species
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What do you already know about speciation through polyploidy?
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Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 22 – The Origin of Species
Check All That Apply Questions
29. Check all that apply: Members of the same biological species can
Multiple Choice Questions
30. Punctuated equilibrium proposed by Eldredge and Gould in 1972 is an evolutionary
process that involves
Check All That Apply Questions
31. Select the concepts emphasized by Ernst Mayr’s biological species concept. Check all that
apply.
Chapter 22 – The Origin of Species
32. Two hundred years ago, the fly species Rhagoletis pomonella only laid its eggs on fruit of
the hawthorn tree. Today, different “host races” of R. pomonella lay their eggs on hawthorns
OR apples. Apples occur within the range of hawthorns, so divergence between apple flies
and hawthorn flies could be the first step in sympatric speciation. Choose the evidence that
would suggest that R. pomonella is currently undergoing sympatric speciation. Check all that
apply.
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•
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•
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Reflect on Process
•
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 22 – The Origin of Species
Multiple Choice Questions
33. A virgin pine forest covers a valley, and one of the inhabitants is a red squirrel species. A
large volcanic eruption occurs and separates the valley with a huge lava flow, thus producing
two populations of squirrels. What must occur for the two populations of squirrels to be
considered separate species?
Chapter 22 – The Origin of Species
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•
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What do you already know about speciation?
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•
Given what you now know, what information and/or problem solving approach is most
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Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 22 – The Origin of Species
34. Two bird species have different mating calls, occupy different habitats in nature, and
when they hybridize, the hybrids are infertile. Which isolating mechanisms maintain these
species?
Chapter 22 – The Origin of Species
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 22 – The Origin of Species
35. Adaptive radiation is best described as the
36. The most common mechanism for sympatric speciation in plants is
37. Lake Victoria is famous for its variety of cichlid fishes. In fact, they offer the most
diverse assembly of vertebrates presently known to science. One trait that scientists have
focused on as one possible reason for their adaptability is
Chapter 22 – The Origin of Species
38. Two populations that inhabit the same area but remain genetically distinct can best be
called
39. The biological species concept of Ernst Mayr cannot be applied to
Check All That Apply Questions
40. Which examples would be considered different species under the biological species
concept? Check all that apply.
Chapter 22 – The Origin of Species
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Multiple Choice Questions
Chapter 22 – The Origin of Species
41. Which statement is true about speciation on island archipelagos?
42. Which form of speciation is most rapid?
43. Several species of sea urchins may inhabit the same tide pool and their reproductive
periods overlap. Although they practice external fertilization, they seldom interbreed because
eggs produce chemicals that are only attractive to sperm of their own species. This is an
example of a _________ barrier that _______________.
Chapter 22 – The Origin of Species
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•
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•
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•
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process break down or lead you astray? How can you revise your approach to produce a
Chapter 22 – The Origin of Species
44. Many male songbirds have very distinctive songs that are used to attract females. These
songs are an example of a ________ isolating mechanism.
Chapter 22 – The Origin of Species
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
Gather Content
•
What do you already know about reproductive isolation?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 22 – The Origin of Species
45. Due to character displacement, two closely related species may differ most
morphologically when they
46. Several new tetraploid species of a plant called salsify (Tragopogon) known as salsify
have arisen in western North America. These new species each arose from a diploid species
that went through the process of allopolyploidy. This mode of speciation is a type of
________ and it occurs _______.