'Isolating mechanisms' diaporamas de présentation

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Evolutionary Patterns, Rates, and Trends

Evolutionary Patterns, Rates, and Trends. Chapter 13. Asteroid Impacts. Many past catastrophic impacts altered the course of evolution Iridium layer implicates asteroid in extinction of dinosaurs Asteroids are still a threat. Macroevolution.

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Acclimatization effects on final rectal temperature, heart rate, and sweat rate, for a group of men exposed daily to 2

Fall 05 skip. acclimitization. Acclimatization effects on final rectal temperature, heart rate, and sweat rate, for a group of men exposed daily to 2 hr of hard work in a hot environment. (after Leithead CS, Lind AR. Heat Stress and Heat Disorders. 1964. Philadelphia, Pa.: FA Davis Co, 304.

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Evolutionary Thought Timeline + Chap 9 and 10

Evolutionary Thought Timeline + Chap 9 and 10. Organisms Life Histories and Evolutionary Fitness . Bit of review. Convergent Evolution - . Convergence. Convergence. Theria. Eutheria. Metatheria. ancestor. Cactacea Euphorbacea. Adaptation. Pre-Darwinian idea Old School Adaptation:.

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The Diversity of Species

The Diversity of Species. Speciation. A single species can diverge to produce several new species Ancestral South American tortoise split to produce the giant Galapagos Island tortoise Speciation is a key par of the theory of evolution. Speciation. 3 broad processes that work together:

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Evolution

Evolution. Evidence of Evolution Speciation Isolating Mechanisms. Evolution. = a genetic change in a population - Due to the increase or decrease of gene frequencies. The Evidence for Evolution. Fossils

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The Origin of Species

The Origin of Species. Chapter 24 BCOR 012 Jan. 31 and Feb. 2, 2011. Outline for January 31, Feb. 2, 2011:. I. Introduction II. What is a species? The biological species concept Reproductive isolating mechanisms Alternative species concepts III. Modes of speciation Allopatric Sympatric

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Speciation

17. Speciation. Concept 17.1 Species Are Reproductively Isolated Lineages on the Tree of Life. Species : groups of organisms that mate with one another Speciation : divergence of biological lineages and emergence of reproductive isolation between lineages

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Chapter 16

Chapter 16. The Origin of Species. What Is a Species?. Each species evolves independently Today, a species is defined as a group of populations that evolves independently

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How Diversity Evolves

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SPECIES & SPECIATION

SPECIES & SPECIATION. (a) In your own words define what is the species? (b) What is speciation?. SPECIES & SPECIATION. The term " species " is used simultaneously for the unit of evolution & the unit of classification. It is a taxonomic category below genus. Species Classification.

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Chapter 24 ~Macroevolution Origin of Species

Chapter 24 ~Macroevolution Origin of Species. What is a species?. A population whose members have the potential to interbreed and produce viable, fertile offspring. Horse. +. Zebra. Zorse = not-fertile. Patterns of Evolution. Divergent Evolution

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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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Species

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Speciation

Speciation. Hyla chrysoscelis. Hyla versicolor.

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The Evolution of Populations & Speciation

The Evolution of Populations & Speciation. Chapter 16. Genetic Equilibrium. Population Genetics: the study of evolution from a genetic viewpoint Most popltns have variation amongst their traits i.e. different heights, skin color, etc. If graphed, looks like a bell.

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