Ms.Sastry, AP Biology
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Chapter 24–Macroevolution–follow along in class notes
Central Questions: know these answers!
1) What is macroevolution?
2) What is a species and what barriers prevents 2 evolving populations/species from producing fertile
offspring?
3) How are the above barriers formed? How does this result in macroevolution?
4) How fast does macroevolution occur?
What are the barriers that keep species apart?
Background: ‘Species’ – how is this word
interpreted in Biology?
What are the prezygotic barriers that prevent
production of a fertile offspring? Explain with
examples.
What are the 2 kinds of barriers that could develop
between 2 populations in order for them to be designated
as 2 species?
What are the postzygotic barriers that prevent production
of a fertile offspring? Give examples.
Ms.Sastry, AP Biology
How are barriers created?
What are 2 common patterns of speciation?
There
What is the ‘recipe’ to create a new species?
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Explain with examples how barriers are created so
that new species can start evolving.
Allopatric speciation:
Ring species:
Sympatric speciation:
What mechanism could be responsible for creating a
barrier for sexual reproduction, eventually leading to
speciation?
Explain the differences between Darwin’s theory of
slow descent – Gradualism – and Punctated equilibrium.
Ms.Sastry, AP Biology
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