'Parent species' presentation slideshows

AGEH 28, Fall 2013 Shasta College campus

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What Species Are and How They Arise

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Chapter 7

Chapter 7 Evolution and the Fossil Record Chapter 7 - Guiding Questions What lines of evidence convinced Charles Darwin that organic evolution produced the species of the modern world? What are the components of natural selection?

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Chapter 7

Chapter 7. Evolution and the Fossil Record. Chapter 7 - Guiding Questions. What lines of evidence convinced Charles Darwin that organic evolution produced the species of the modern world? What are the components of natural selection?

758 views • 53 slides

Chapter 19: Speciation and Macroevolution

Chapter 19: Speciation and Macroevolution. Biological Species Concept. Species consist of 1+ populations whose members are capable of interbreeding in nature to produce fertile offspring and do not interbreed with members of different species Sexual reproduction Reproductive isolation.

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Chapter 24 ~ The Origin of Species

Chapter 24 ~ The Origin of Species. Introduction. Evolutionary theory also explains macroevolution , the origin of new taxonomic groups (new species, new genera, new families, new kingdoms) Speciation is the keystone process in the origination of diversity of higher taxa.

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Darwin & Microevolution

Darwin & Microevolution. Chapter 19-20. Charles Darwin (1809-1882). Former divinity and medical student Secured an unpaid position as ship's naturalist on the H.M.S. Beagle Voyage provided Darwin a unique opportunity to study plants, animals, and their environment

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Mechanisms of Evolution

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How Populations Evolve

How Populations Evolve. Gene pool. All genes present in population. microevolution. Change in relative frequencies of alleles in a population over time

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DAY 6: Sources of genetic variation

DAY 6: Sources of genetic variation. IMSS BIOLOGY ~ SUMMER 2011. LEARNING TARGETS. To understand sources of genetic variation, in particular Mutation Sex (and no sex) To understand patterns of inheritance, beyond the monohybrid crosses

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Post-zygotic isolation results when hybrid offspring are: - inviable (fail to develop at all)

Post-zygotic reproductive isolation. Post-zygotic isolation results when hybrid offspring are: - inviable (fail to develop at all) - viable, but infertile (one or both sexes cannot reproduce) Hybrid breakdown is the term for infertility in viable hybrids

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Mechanisms of Evolution

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CHAPTER 24 THE ORIGIN OF SPECIES

CHAPTER 24 THE ORIGIN OF SPECIES. Section A: What Is a Species?. 1. The biological species concept emphasizes reproductive isolation 2. Prezygotic and postzygotic barriers isolate the gene pools of biological species 3. The biological species concept has some major limitations

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Lizards & Snakes & Tuatara Part III

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Speciation

Speciation. Level 1 Biological Diversity Jim Provan. Campbell: Chapter 24. Modes of speciation. Reproductive barriers form boundaries around species and the evolution of these barriers is the key biological event in the origin of new species:

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Evolution in Action

Evolution in Action. Evolution In Action. Evolution is a continuous process that is happening all the time Many people have a hard time noticing this because how long it takes to happen. Evolution In Action.

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Stephanomeria exigua Parent Species

Stephanomeria exigua Parent Species. Stephanomeria malheurensis Selfing Species. Asteraceae. Pink petals. Small Amounts of nectar. Landing Platform. Mimulus lewisii (low to mid-elevation) Bee pollinated. Red Petals. Large amounts of nectar. Reflexed petals, no landing platform.

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Chapter #29 Evolution

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Definition of a Species

Definition of a Species. General Definition. Similar physical characteristics you can observe Interbreed in the wild and have fertile offspring Distinguished genetically from other species Have common phylogeny (evolutionary derivation). Hybrid organisms.

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