'Sympatric' diaporamas de présentation

Chapter 5: Evolution and Community Ecology

Chapter 5: Evolution and Community Ecology. Section 1: Evolution. Describe the four primary mechanisms of biological evolution Describe how speciation and extinction affect the diversity of life on Earth.

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Introductory Questions #32

Introductory Questions #32. How can allele frequencies change in a population and increase variation? Give three examples. What do we call this when this is happening? Does natural selection operate directly on the phenotype or genotype of organisms? Briefly explain your choice.

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Big Idea #1 Part C

Big Idea #1 Part C. Speciation and Extinction (Rates/adaptive radiation) Role of Reproductive Isolation Populations continue to evolve. Evolution Continues in a Changing Environment. Concept 24.3: Hybrid zones provide opportunities to study factors that cause reproductive isolation.

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Introduction of Phylogeography : trends and perspective

Introduction of Phylogeography : trends and perspective. Fang DU dufang325@gmail.com Beijing Forestry University. Outline. Concept & Development The main scientific questions To infer the demographic history of important species To understand the mechanisms of speciation

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Chapter 24 The Origin of Species Part C

Chapter 24 The Origin of Species Part C. Allopatric and Sympatric Speciation: A Review. In allopatric speciation, geographic isolation restricts gene flow between populations

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AP Biology Exam Review 2002-2003

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CQ#1: Speciation can only be observed over millions of years:

What is a Species? Speciation and the Maggot Fly by Joan Sharp Simon Fraser University Modified from a case by Martin G. Kelly, Buffalo State College. CQ#1: Speciation can only be observed over millions of years:. True False.

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Big Idea 1

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Chapter 24

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D2 Species and Speciation

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10/16 Daily Catalyst

10/16 Daily Catalyst. 1. If 9% of the population has blue eyes, what percent of the population is hybrid for brown eyes? Homozygous for brown eyes? 2. Why are the peppered and charcoal moths an example of directional selection? 3. Explain the term balanced polymorphism.

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Evolution 3.5

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4.3 Evolution and Adaptation

4.3 Evolution and Adaptation. Evolution. Long periods of time Millions of years Species change over time Due to genetic mutation of traits Mutations passed to offspring New offspring make populations. Charles Darwin. 1835 Traveled on the Beagle Studied life forms at each port

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LESSON # 23

LESSON # 23. THE OUTCOMES OF EVOLUTION:. Macroevolution. MICRO EVOLUTION. MACRO EVOLUTION. EVOLUTION. Any genetically based phenotype change in a population of organisms over successive generations.

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Speciation

Speciation. Species . One or more populations of individuals that can inter breed under natural conditions and produce fertile offspring. Different species may arise from genetic divergence between populations. Genetic Divergence.

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Fig. 24-5

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The Origin of Species

The Origin of Species. Macroevolution. Macroevolution: the origin of new taxonomic groups Speciation: the origin of new species Anagenesis (phyletic evolution): accumulation of heritable changes

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Speciation

Speciation. The Process by which new Species Arise. Isolation . The mechanism that drives speciation 2 types Geographic Reproductive. Geographic. Physical features that prevent interaction Mountains, rivers, canyons, oceans, highways, fences, cities The isolation is External.

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Indigo snake

Indigo snake. By: Andrew Nickerson. There Habitat . They are found in a variety of habitats. But their habitat is dependant on there location.

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