Unit 8: Evolution - Sonoma Valley High School
... 6. Make of flow chart of the both the changes and causes of the changes in horses over the past 60 million years. 7. Explain how the following are used to support the theory of evolution: homology, development, and imperfect structures. After reading pg: 436-446: Define the following terms: speciati ...
... 6. Make of flow chart of the both the changes and causes of the changes in horses over the past 60 million years. 7. Explain how the following are used to support the theory of evolution: homology, development, and imperfect structures. After reading pg: 436-446: Define the following terms: speciati ...
Evolution
... What is a Species? • A group of individuals that – are morphologically & reproductively more similar to one another than to other populations, – share a singular ancestordescendant heritage, ...
... What is a Species? • A group of individuals that – are morphologically & reproductively more similar to one another than to other populations, – share a singular ancestordescendant heritage, ...
Concepts of Evolution
... dividing line between micro- and macroevolution. Speciation is the final result of changes in the gene pool and genotypic frequencies. Some members of a sexually reproducing population change so much that they can no longer produce fertile offspring with members of the original population ...
... dividing line between micro- and macroevolution. Speciation is the final result of changes in the gene pool and genotypic frequencies. Some members of a sexually reproducing population change so much that they can no longer produce fertile offspring with members of the original population ...
Chapter 5 Lecture PowePoints
... Revision note: The next slides are an alternative to the last slide, (#22). Slide #22 represents the Malthusian argument which inspired Darwin, but it does not appeal to the experience and knowledge of the average student today. Effective presentations should start with what students know intuitivel ...
... Revision note: The next slides are an alternative to the last slide, (#22). Slide #22 represents the Malthusian argument which inspired Darwin, but it does not appeal to the experience and knowledge of the average student today. Effective presentations should start with what students know intuitivel ...
Natural s
... founding population enters isolated niche 3. Parapatric speciation - new niche found adjacent to original one 4. Sympatric speciation - speciation occurs without physical separation ...
... founding population enters isolated niche 3. Parapatric speciation - new niche found adjacent to original one 4. Sympatric speciation - speciation occurs without physical separation ...
Mechanisms for Evolution
... event lowers the population dramatically – has a negative affect on the population • The founder effect can cause genetic drift if a small number of individuals found a new area • Sexual selection occurs when a characteristic increases the chance of mating – Intrasexual – members of the same sex com ...
... event lowers the population dramatically – has a negative affect on the population • The founder effect can cause genetic drift if a small number of individuals found a new area • Sexual selection occurs when a characteristic increases the chance of mating – Intrasexual – members of the same sex com ...
Evolution and Natural Selection
... diverges, and can no longer breed and produce viable offspring, often due to reproductive isolation – Allopatric speciation – when a physical barrier divides one population into two or more populations. The separate populations will eventually contain organisms that, over time will no longer be able ...
... diverges, and can no longer breed and produce viable offspring, often due to reproductive isolation – Allopatric speciation – when a physical barrier divides one population into two or more populations. The separate populations will eventually contain organisms that, over time will no longer be able ...
Mechanisms of Evolution
... diverges, and can no longer breed and produce viable offspring, often due to reproductive isolation – Allopatric speciation – when a physical barrier divides one population into two or more populations. The separate populations will eventually contain organisms that, over time will no longer be able ...
... diverges, and can no longer breed and produce viable offspring, often due to reproductive isolation – Allopatric speciation – when a physical barrier divides one population into two or more populations. The separate populations will eventually contain organisms that, over time will no longer be able ...
Darwin and His Theory
... • Organisms can look very much alike, but be two species if this occurs. • The idea is that eventually diversity will build up in the populations independently and thus would eventually look different. ...
... • Organisms can look very much alike, but be two species if this occurs. • The idea is that eventually diversity will build up in the populations independently and thus would eventually look different. ...
Natural Selection (8a)
... 36. The type of genetic drift that follows colonization of a new habitat by a small group of individuals is called ...
... 36. The type of genetic drift that follows colonization of a new habitat by a small group of individuals is called ...
chapter 6
... b. Populations that reproduce slowly take a long time to adapt through natural selection. c. For a new favorable trait to predominate, most of an existing population would have to die prematurely. E. Evolution is concerned with leaving the most descendants, NOT the strongest ones. F. There is no mas ...
... b. Populations that reproduce slowly take a long time to adapt through natural selection. c. For a new favorable trait to predominate, most of an existing population would have to die prematurely. E. Evolution is concerned with leaving the most descendants, NOT the strongest ones. F. There is no mas ...
Anth2301_Macroevolution_1
... • Speciation: new species from a “parent” species. • Reduction of gene flow followed by genetic divergence such as mutation or natural selection. • At minimum outcome is two separate species, but sometimes many new species can form which is the result of adaptive radiation. ...
... • Speciation: new species from a “parent” species. • Reduction of gene flow followed by genetic divergence such as mutation or natural selection. • At minimum outcome is two separate species, but sometimes many new species can form which is the result of adaptive radiation. ...
Natural Selection
... If there is such a thing as natural selection, is there such a thing as artificial selection? • Yes! Artificial selection is the breeding of certain traits over others. • Most examples of artificial selection fall into the category of selective breeding, in which particular individuals are selected ...
... If there is such a thing as natural selection, is there such a thing as artificial selection? • Yes! Artificial selection is the breeding of certain traits over others. • Most examples of artificial selection fall into the category of selective breeding, in which particular individuals are selected ...
Exam 4 Q3 Review Sheet Honors Biology Exam 4 will cover
... assumption and how does assuming this help us in life? 34. Be able to do the Hardy-Weinberg problems. There is a practice sheet online. There will certainly be a problem or two. 35. Describe what is meant by a polymorphism and give examples. 36. Describe what is meant by a cline and give examples. 3 ...
... assumption and how does assuming this help us in life? 34. Be able to do the Hardy-Weinberg problems. There is a practice sheet online. There will certainly be a problem or two. 35. Describe what is meant by a polymorphism and give examples. 36. Describe what is meant by a cline and give examples. 3 ...
SCBI124_KAEN_ENG
... genetically, suggested that they diverged just recently, probably from food ...
... genetically, suggested that they diverged just recently, probably from food ...
Review Slides - Evolution
... The more similar the DNA coding of two organisms, the more closely related they are. Doesn’t mean they evolved from each other, but that they are more likely to share a common ancestor. Whale DNA is more similar to Artiodactyls DNA ...
... The more similar the DNA coding of two organisms, the more closely related they are. Doesn’t mean they evolved from each other, but that they are more likely to share a common ancestor. Whale DNA is more similar to Artiodactyls DNA ...
SF Ev L8 Speciation in animals
... “There is probably no other concept in biology that has remained so ...
... “There is probably no other concept in biology that has remained so ...
SI - TEST 4 STUDY GUIDE
... Draw a trait distribution indicating which parts of the distribution are favored ...
... Draw a trait distribution indicating which parts of the distribution are favored ...
Unit 6
... 5. Explain, in their own words, how hybrid breakdown maintains separate species even if gene flow occurs. Even if two species were to mate successfully and produce viable offspring, when that offspring next tried to mate it would produce offspring that were feeble or sterile. 6. Distinguish between ...
... 5. Explain, in their own words, how hybrid breakdown maintains separate species even if gene flow occurs. Even if two species were to mate successfully and produce viable offspring, when that offspring next tried to mate it would produce offspring that were feeble or sterile. 6. Distinguish between ...
Evolution Test Review
... because they have the same bones but use them for different functions. 9. The hip bones in whales and snakes serve no function, so they are examples of (vestigial organs or homologous structures). 10. (Analogous or homologous structures) show that two species evolved from a common ancestor. 11. An a ...
... because they have the same bones but use them for different functions. 9. The hip bones in whales and snakes serve no function, so they are examples of (vestigial organs or homologous structures). 10. (Analogous or homologous structures) show that two species evolved from a common ancestor. 11. An a ...
Chapter 11 Power Point
... • The founding of a small population can lead to genetic drift. – It occurs when a few individuals start a new population. – The founder effect is genetic drift that occurs after start of new population. ...
... • The founding of a small population can lead to genetic drift. – It occurs when a few individuals start a new population. – The founder effect is genetic drift that occurs after start of new population. ...
Biological Evolution - Western Washington University
... The location of the Adams mammoth find and the animal’s tooth structure led Georges Cuvier of the Paris museum of natural history to his pioneering conclusion that it was a cold-adapted, extinct local species of proboscidean, the family to which all elephants, mammoths, and mastodons belong. This wa ...
... The location of the Adams mammoth find and the animal’s tooth structure led Georges Cuvier of the Paris museum of natural history to his pioneering conclusion that it was a cold-adapted, extinct local species of proboscidean, the family to which all elephants, mammoths, and mastodons belong. This wa ...
AP Bio Evolution Lec Ch. 22-25
... population size due to a change in the environment • The resulting gene pool may no longer be reflective of the original population’s gene pool • If the population remains small, it may be further affected by genetic drift ...
... population size due to a change in the environment • The resulting gene pool may no longer be reflective of the original population’s gene pool • If the population remains small, it may be further affected by genetic drift ...
evolution
... – Outline the evidence for evolution provided by the fossil record, selective breeding of domesticated animals and homologous structures. D.1.1 – Describe four processes needed for the spontaneous origin of life on Earth. D.1.2 – Outline the experiments of Miller and Urey into the origin of organic ...
... – Outline the evidence for evolution provided by the fossil record, selective breeding of domesticated animals and homologous structures. D.1.1 – Describe four processes needed for the spontaneous origin of life on Earth. D.1.2 – Outline the experiments of Miller and Urey into the origin of organic ...
Sympatric speciation
Sympatric speciation is the process through which new species evolve from a single ancestral species while inhabiting the same geographic region. In evolutionary biology and biogeography, sympatric and sympatry are terms referring to organisms whose ranges overlap or are even identical, so that they occur together at least in some places. If these organisms are closely related (e.g. sister species), such a distribution may be the result of sympatric speciation. Etymologically, sympatry is derived from the Greek roots συν (""together"", ""with"") and πατρίς (""homeland"" or ""fatherland""). The term was invented by Poulton in 1904, who explains the derivation.Sympatric speciation is one of three traditional geographic categories for the phenomenon of speciation. Allopatric speciation is the evolution of geographically isolated populations into distinct species. In this case, divergence is facilitated by the absence of gene flow, which tends to keep populations genetically similar. Parapatric speciation is the evolution of geographically adjacent populations into distinct species. In this case, divergence occurs despite limited interbreeding where the two diverging groups come into contact. In sympatric speciation, there is no geographic constraint to interbreeding. These categories are special cases of a continuum from zero (sympatric) to complete (allopatric) spatial segregation of diverging groups.In multicellular eukaryotic organisms, sympatric speciation is thought to be an uncommon but plausible process by which genetic divergence (through reproductive isolation) of various populations from a single parent species and inhabiting the same geographic region leads to the creation of new species.In bacteria, however, the analogous process (defined as ""the origin of new bacterial species that occupy definable ecological niches"") might be more common because bacteria are less constrained by the homogenizing effects of sexual reproduction and prone to comparatively dramatic and rapid genetic change through horizontal gene transfer.