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Speciation

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What is Speciation?. A species is defined as a group of organisms that can successfully interbreed, producing fertile offspring.Speciation

Speciation

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Speciation

Speciation . Chapter 17. Barriers to Gene Flow. Whether or not a physical barrier deters gene flow depends upon: Organism’s mode of dispersal or locomotion Duration of time organism can move . Genetic Drift in Snail Populations. Robert Selander studied Helix aspersa

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Speciation

Speciation. Process by which species originate Origin of diversity we observe in nature. Outline. Species concepts Species numbers through time What drives speciation? Two examples Discussion. Species Concepts. Typological Biological Evolutionary Genealogical Ecological Cohesive.

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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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Speciation

Speciation. Microevolution. Microevolution is the change in allele frequencies within a population over a few generations. Insects that carry the allele which makes them able to tolerate DDT Increased in number significantly f rom 1955 to 1984.

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Speciation

Speciation. Introduction. Species continue to evolve Changes that occur within species (microevolution) are easy to understand F aster-running cheetahs Colourful male songbirds Larger brains in humans But what factors lead to speciation - the evolution of an entirely new species?.

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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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Speciation

Speciation. Evolution explained. Mutation. The DNA in genes in all living things acts as a blue print for the production of various proteins.

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Speciation

Speciation. The formation of new species. The Biological Species Concept. In evolutionary terms a species is a group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring; they do not breed successfully with other populations.

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Speciation

Speciation. Speciation. The evolution of new species. Terms. Population- A localized group of individuals belonging to the same species . Species- A group of populations whose individuals have the potential to interbreed and produce viable offspring. Speciation.

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Speciation

Speciation. How do new species evolve?. Background. What is the definition of a species? a group of individuals that produce fertile, viable offspring, in nature. . Even though these smiley face spiders look different they are the same species. (Variation in species). Definition.

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SPECIATION

SPECIATION. SPECIATION. SPECIATION: Formation of new species SPECIES: Group of similar organisms that can breed &amp; produce fertile offspring. SPECIATION. REPRODUCTIVE ISOLATION: When members of 2 populations cannot interbreed to produce fertile offspring. SPECIATION.

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Speciation

Speciation. More about change over time…. Adaptations. All organisms have adaptations that help them survive and thrive. Some adaptations are structural.

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Speciation

Speciation. 1. In your blog: What is a species? . D2.3 What is a species?. Ecological species = set of organisms adapted to a particular set of resources in an environment (niche) Genetic species = similarity of DNA Evolutionary species = share a similar ancestor

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Speciation

Speciation. “It is really laughable to see what different ideas are prominent in various naturalists’ minds, when they speak of ‘species’. It all comes, I believe, from trying to define the indefinable”. Charles Darwin. What is a species?. Using the BSC.

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Speciation

Speciation. How do we get new species on Earth?. What is a species?. Remember: A species is a group of organisms that can breed and produce viable and fertile offspring. . Two animals are NOT the same species if they cannot mate and produce a living, fertile baby. How do new species form?.

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Speciation

Speciation. How do new species originate?. Populations must become isolated Reproductive isolation is key! Once isolated, populations will evolve independently (different factors affecting each) Two types of speciation allopatric geographic separation “ other country ” sympatric

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Speciation

Speciation. Speciation. Speciation = formation of new species Species = group of organisms that breed with one another and produce fertile offspring in nature (share a common gene pool). Speciation can happen in two modes. Modes of speciation:

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SPECIATION

SPECIATION. Ch. 16-3 pp. 326-330. Forming a new species. Speciation: forming a new species. Forming a new species. Speciation: forming a new species Species : a group of organisms that can mate and produce fertile offspring. Forming a new species. Speciation: forming a new species

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Speciation

Speciation. Any element exists in a solution, solid, or gas as 1 to n ions, molecules, or solids Example: Ca 2+ can exist in solution as: Ca ++ CaCl + CaNO 3 + Ca(H 3 SiO 4 ) 2 CaF + CaOH +

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Speciation

Speciation. Different species of swallowtail butterflies in the genus Papilio. Speciation refers to the process by which new species are formed. Speciation occurs when gene flow has ceased between populations where it previously existed.

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Speciation

Speciation. The Biological Species Concept. based primarily on the actual or potential ability to produce fertile offspring by members of a group of organisms and results in reproductive isolation from other such groups (by Ernst Mayr).

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Speciation

Speciation. Creation of Unique Gene Pools. I. Introduction. A. Microevolution vs. macroevolution 1. microevolution a. Definition b. Example c. Importance in evolutionary process d. Can be seen e. Measurable f. Natural selection. 2. macroevolution.

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