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18 Phylogeny Classification
Variations in morphology between populations of Cichlasoma minckleyi
Variations in morphology between populations of Cichlasoma minckleyi molariform morph
Clinal variation: isophene map of Coluber constrictor (racer)
Clinal variation: Coluber constrictor (racer)
Clinal variation: isophene map of Asclepias tuberosa (milkweed)
Clinal variation: Asclepias tuberosa (milkweed)
Altitudinal cline in height of the herb Achillea lanulosa
Two subspecies of Canada goose (Branta canadensis)
Discordant geographic variation in six characters of Coluber constrictor
Grand Canyon squirrels:
Model of geographic speciation
Mating seasons at Ithaca, New York, for five species of frogs
A male fiddler crab (Uca)
Scotch broom (Cytisum scoparius) pollination by a bumble bee
Evening primrose (Oenothera)
Speciation through a developmental mutation?
Sympatric speciation in treehoppers
Galapagos Islands…oceanic islands of Ecuador
Model of speciation on the Galapagos Islands
Beak Sizes of ground finches
A tool-using finch
Beak differences in Hawaiian honeycreepers
Competition and extinction in Paramecium
Gradualism vs Punctuated Equilibrium
Species from the Burgess shale: Polychaete worm and Chordate
Species from the Burgess shale: Arthropods
Flower and fruits of apomictic organism: Taraxacum officinale Zygote is from fusion of maternal haploids or from diploid
A phylogenetic tree for Darwins finches
Presumed evolution of horses:
Patterns of evolution
Marsupials are convergent with placentals of other continents: Marsupial mouse: Sminthopsis dolichura
Marsupials are convergent with placentals of other continents: Marsupial glider: Petauroides volans
Marsupials are convergent with placentals of other continents: Marsupial tiger cat: Dasyurus maculatus
Marsupials are convergent with placentals of other continents: Cuscus: Phalanger maculatus
Construction of evolutionary trees from phenetic data
An example of cladistic analysis
Cladistic analysis of the phylogeny of higher vertebrates
Alternative generic groupings for four related species
Measuring beak length
Measuring beak width
Measuring beak height
Beak depth of parents and offspring
Individuals with particular beak depths
Intrinsic isolating mechanisms
Classification of six species
MECHANISMS OF EVOLUTION. POPULATIONS, NOT INDIVIDUALS, EVOLVE An organism cannot change its phenotype. A phenotype can become more predominant in a population,
SPECIATION -The Origin of Species. What is speciation? Recap: Species = a population or group of populations whose individual members can interbreed.
Speciation. Speciation is the origin of new species A species is a population or group of populations whose members have the potential to interbreed.
LS Chapter 5-3 Evolution of Species. Which is the closer relative?
CHAPTER 14 The Origin of Species The origin of new species is called speciation.
Speciation …is the formation of a new species as a result of gradual changes within a population. 3 events lead to speciation: separation, adaptation and.
The Origin of Species Chapter 24. Basics Speciation Macroevolution Two basic patterns of evolution: Anagenesis Cladogenesis.
Speciation. What is Speciation? How does speciation occur? The formation of a species; when two or more species are created from an ancestral group Occurs.
Part 2 Evolution Notes. Natural Selection and Macroevolution Natural Selection shapes a population, making it adapted to its current environment. This.
Lesson Overview 17.3 The Process of Speciation. Lesson Overview Lesson Overview The Process of Speciation Evolutionary Classification Cladogram-shows.
What is a Species? Biological species = A population or group of populations whose members have the potential to interbreed with one another in nature.
Foothill High School Science Department Evolution of Populations The Process of Speciation.
Mechanisms of Speciation, Maintaining a Species, and Types of Evolution (Chap. 20)
The Origin of Species chapter 24.
Ch. 16: Evolution of Populations. Ch. 16: Outline 16-3: The Process of Speciation –Isolating Mechanisms –Testing Natural Selection in Nature –Speciation.
What is a species? Its not as straightforward a question as most believe. Macroevolution and Speciation Evolution creates (and destroys) new species, but.
Is "brown hair" a genotype or a phenotype? Does natural selection work directly on genotype or phenotype?
pt 10 pt 15 pt 15 pt 20 pt 20 pt 25 pt 25 pt 5 pt 5 pt 10 pt 10 pt 15 pt 15 pt 20 pt 20 pt 25 pt 25 pt 5 pt 5 pt 10 pt 10 pt 15 pt 15 pt 20 pt.
What is a species? Its not as straightforward a question as most believe. Speciation Evolution creates (and destroys) new species, but …
Mader: Biology 8 th Ed.. Population Genetics Genetic diversity in populations changes over generations Forces that cause populations to evolve Allele.
Ecosystems Diversity Natural Selection and Evolution.
Warm Up: Are these examples of Geographic (G), Behavioral (B), or Temporal (T) isolation? _______1. Two species of fireflies come out between the hours.
THE ORIGIN OF SPECIES Chapter 24 Origin of Species Macroevolution – the origin of new taxonomic groups Speciation – the origin of new species.
What is a species? Its not as straightforward a question as most believe. Macroevolution and Speciation Evolution creates (and destroys) species, but …
Intro to Natural Selection Sept 2008 “Survival of the fittest”
Charles Darwin Wrote in 1859“On the Origin of Species by Means of Natural Selection”Wrote in 1859:“On the Origin of Species by Means of Natural Selection”
EVOLUTION and DIVERSITY A process of change over time Existing - Genetic diversity – Evidence Geologic fossil record shows -
Natural Selection And other mechanisms for Evolution.
Chapter 17 Opener. Figure 24.5 A summary of reproductive barriers between closely related species.
Contrasting modes of inheritance (A) sexual and (B) asexual.
Lecture Topic : Speciation I. Importance What are species? How do they evolve? II. Levels of Variation ~ microevolution A) Variation within locally breeding.
Chapter 16 Evolution of Populations. What Darwin Did Not Know He did not know how traits were passed on from one generation to the next. He did not know.
Mechanisms of Evolution. I. Natural Selection & Charles Darwin Charles Darwin ( ) an English scientist considered the founder of the evolutionary.
Speciation: How Species Form Lesson 6. SPECIATION Microevolution: changes in allele frequencies and phenotypic traits within populations and species;
1 The Origin of Species Chapter The Origin of Life Alexander Oparin and coacervates Theory that extends evolution back to the Earth’s beginning.
Unit 7. Charles Darwin 1831 – Unpaid naturalist - HMS Beagle Explored coastlines for ~5 years Noticed that many plants & animals on the Galapagos.
Evolution and Speciation. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Primate Family: Hominidae Genus: Homo Species: sapiens Varieties and.
Other Causes of Variation 14.3, 14.4, 14.5 Starting page 299.
Convergent, divergent, parallel and co-evolution.
1. Try to answer each question on your own before looking at the answer 2. When you get to the end, redo the practice test, OVER and OVER again, the more.
Macroevolution & Speciation Accel Bio What is a species? Species means “kind” or “type” Older way of looking at this question: Morphological Species.
Speciation, Reproductive Isolation, and Patterns of Evolution AP Biology Evolution IV.
1 The Origin of Species Chapter Outline The Nature of Species Pre and Postzygotic Isolating Mechanisms Geography of Speciation Hawaiian Drosophila.
Evolution: Evidence of Change & How Change Occurs.
© 2012 Pearson Education, Inc. Lecture by Edward J. Zalisko PowerPoint Lectures for Campbell Biology: Concepts & Connections, Seventh Edition Reece, Taylor,
Chapter 24 The Origin of Species. Question? u What is a species? u Comment - Evolution theory must also explain how species originate. u Darwin’s “Mystery.
Origin of Species Galapagos Tortoise. Origin of Species patterns of speciation Anagenesis Anagenesis –A single population is transformed enough to be.
Ch. 16 Evolution of Populations. Variations and Gene Pools Gene pool – consists of all genes, including all the different alleles, that are present.
Figure 24.0 A Galápagos Islands tortoise. Figure 24.1 Two patterns of speciation.
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