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Adaptive radiation Divergence Different traits in closely related species Common Ancestral species many species adapted to different habitats
Anoles diversity is most striking in the Caribbean
Adaptive Radiation Hawaiian honeycreepers Variation in color and bill shape is related to their habitat and diet
Cichlid fish of the Great Lakes of Africa. Species flocks fill different ecological niches.
HOMOLOGOUS STRUCTURES Front legs / arms of many animals have similar basic structures
Adaptive Radiation Disappearance of dinosaurs led to the adaptive radiation of mammals
Videos Wolfe: Adaptive radiation
Patterns of Evolution Objectives:
SBI3U WARM UP PROOFS of EVOLUTION.
The History of Life Section 17–4 Patterns of Evolution
$200 $300 $400 Final Jeopardy $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 Some More of That.
To Diverge means to spread apart. Think of other words that use the same root word. “Dissect, Divide, Divorce” Could two or more different species have.
Patterns in Evolution.
Convergent evolution Evolution toward similar traits in unrelated species.
How are new species created?
Patterns of Speciation Diversify in Bursts (punctuational) Diversify slowly (gradual) Time No diversification (living fossil) Evolutionary Changes X X.
Evolution in Action. What is a Species? Morphological definition – a species is defined by its structure and appearance Biological definition – a species.
Patterns of Evolution. Macroevolution/Microevolution allele gene Both involve changes in allele frequencies in gene pools same basic Both work through.
Patterns of Evolution Chapter 17 Section 4.
Evidence of Evolution Chapter 15 Part II.
Looking at the “natural” population below: Long neck Long neck Short neck.
Evolution of Populations. Population Genetics Natural Selection: nature selects which individuals survive and reproduce- Evolution: occurs as a populations.
Lesson 5: Biological Diversity Big Question Big Question: Can We Save Endangered Species and Keep Biological Diversity High?
Evolution (I). Alfred Russel Wallace “On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle.
Evolution of Populations. Biologists studying evolution often focus on a particular population. Population - a group of individuals of the same species.
Chapter 16: Evolution of Populations
Speciation can occur in two ways: Allopatric Speciation
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