Speciation
Standard 1.7 Speciation and extinction have occurred throughout the Earth’s history.
Performance Indicators
a. Analyze data related to questions of speciation and extinction throughout the Earth’s history. [SP 5.1]
b. Design a plan for collecting data to investigate the scientific claim that speciation and extinction have occurred throughout
the Earth’s history. [SP 4.2]
Standard 1.8 Speciation may occur when two populations become reproductively isolated from each other.
Performance Indicators
a. Use data from a real or simulated population(s), based on graphs or models of types of selection, to predict what will happen
to the population in the future. [SP 6.4]
b. Justify the selection of data that address questions related to reproductive isolation and speciation. [SP 4.1]
c. Describe speciation in an isolated population and connect it to change in gene frequency, change in environment, natural
selection and/or genetic drift. [SP 7.2]
Standard 1.9 Populations of organisms continue to evolve.
Performance Indicators
a. Describe a model that represents evolution within a population. [SP 1.2]
b. Evaluate given data sets that illustrate evolution as an ongoing process. [SP 5.3]
Topic Presentation: Prezi click here
“Crash Course: Biology” Videos: Speciation- Of Ligers & Men: Biology #15
Videos By Paul Anderson: “Speciation”
Text book reading: Ch. 24 p. 487-504
Questions to answer:
Explain what the “Biological Species” definition is. Describe its strengths and weaknesses.
Why does a biological species have to be reproductively isolated from other organisms?
Compare allopatric and sympatric speciation.
Briefly explain the following species barriers
1. habitat isolation
5. gametic isolation
2. temporal isolation
6. reduced hybrid viability
3. behavioral isolation
7. reduced hybrid vitality
4. mechanic isolation
8. hybrid breakdown
5. Compare the concepts of gradualism and punctuated equilibrium.
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Things you should make sure you understand:
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Alternate definitions of “species”, and why they are necessary.
The evidence that supports that speciation is an ongoing process.
Lab: Speciation in California Salamanders
Class Activity: POGIL – Speciation (copyright)
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HHMI Biointeractive Click & Learn
Sorting Finch Species