8, Tupper seminar, larval type and species selection
... showing where it 1st appeared in the fossil record, and when it disappeared (went extinct) ...
... showing where it 1st appeared in the fossil record, and when it disappeared (went extinct) ...
evolution and speciation ppt regents
... CHANGES IN THE NEW POPULATION’S GENE POOL due to COMPETITION. ...
... CHANGES IN THE NEW POPULATION’S GENE POOL due to COMPETITION. ...
evolution and speciation regents
... CHANGES IN THE NEW POPULATION’S GENE POOL due to COMPETITION. ...
... CHANGES IN THE NEW POPULATION’S GENE POOL due to COMPETITION. ...
Unit 4
... Three major lines Evolution is a scientific theory that explains how life changes of evidence through time. A theory is based on scientific evidence gathered ...
... Three major lines Evolution is a scientific theory that explains how life changes of evidence through time. A theory is based on scientific evidence gathered ...
Chapter 15 - Evolution
... An elongated body, enlarged front paws, small eyes, and a pad of thickened skin that protects a tapered nose all evolved independently in the marsupial Australian “mole” (top) and a eutherian North American mole (bottom). ...
... An elongated body, enlarged front paws, small eyes, and a pad of thickened skin that protects a tapered nose all evolved independently in the marsupial Australian “mole” (top) and a eutherian North American mole (bottom). ...
Evidence for Evolution
... Darwin hypothesized that the Galápagos finches he observed had descended from a common ancestor. He noted that several finch species have beaks of very different sizes and shapes. Each species uses its beak like a specialized tool to pick up and handle its food. Different types of foods are most eas ...
... Darwin hypothesized that the Galápagos finches he observed had descended from a common ancestor. He noted that several finch species have beaks of very different sizes and shapes. Each species uses its beak like a specialized tool to pick up and handle its food. Different types of foods are most eas ...
Ch 23 Clicker Questions
... The gene Pax6 is expressed and required in the developing eye of both molluscs and vertebrates. What is the simplest explanation for this? A. Pax6 is a homeotic gene. B. Pax6 was independently co-opted into the developing eyes of both molluscs and vertebrates. C. Mollusc eyes and vertebrate eyes bo ...
... The gene Pax6 is expressed and required in the developing eye of both molluscs and vertebrates. What is the simplest explanation for this? A. Pax6 is a homeotic gene. B. Pax6 was independently co-opted into the developing eyes of both molluscs and vertebrates. C. Mollusc eyes and vertebrate eyes bo ...
(English, 40 pages)
... years) and Daphne Major (33 years). By simultaneously taking account of ecological, behavioral and genetical aspects of evolution, and being alert to their interconnectedness, we hoped to reach a greater understanding of finch evolution than would be possible from a narrower focus on just one of the ...
... years) and Daphne Major (33 years). By simultaneously taking account of ecological, behavioral and genetical aspects of evolution, and being alert to their interconnectedness, we hoped to reach a greater understanding of finch evolution than would be possible from a narrower focus on just one of the ...
Evolution - Hardin County Schools
... How did Darwin come up with his theories? Charles Darwin was influenced by the ideas of several people. 1. Before the voyage of the Beagle, Jean-Baptiste Lamarck proposed the idea that species change over time. However, Darwin differed with Lamarck on several key points. Lamarck proposed that traits ...
... How did Darwin come up with his theories? Charles Darwin was influenced by the ideas of several people. 1. Before the voyage of the Beagle, Jean-Baptiste Lamarck proposed the idea that species change over time. However, Darwin differed with Lamarck on several key points. Lamarck proposed that traits ...
Ancient Species Flocks and Recent Speciation Events
... The large assemblage of northeastern Pacific species of rockfish (genus Sebastes) has been proposed to be the modern result of an ancient explosive speciation event (Johns and Avise 1998). This radiation has been compared to the more recent radiation of cichlids in the Great African lakes (Greenwood ...
... The large assemblage of northeastern Pacific species of rockfish (genus Sebastes) has been proposed to be the modern result of an ancient explosive speciation event (Johns and Avise 1998). This radiation has been compared to the more recent radiation of cichlids in the Great African lakes (Greenwood ...
Chapter 8 Developing a Theory of Evolution
... his ideas about changes in species over time. By comparing current species of animals with fossil forms, Lamarck observed what he interpreted as a “line of descent,” or progression, in which a series of fossils (from older to more recent) led to a modern species. He thought that species increased in ...
... his ideas about changes in species over time. By comparing current species of animals with fossil forms, Lamarck observed what he interpreted as a “line of descent,” or progression, in which a series of fossils (from older to more recent) led to a modern species. He thought that species increased in ...
Organismal Biology/22B2-DarwinianRevolution
... history, then we should expect to find similar patterns whether we are comparing molecules or bones or any other characteristics. • In practice, the new tools of molecular biology have generally corroborated rather than contradicted evolutionary trees based on comparative anatomy and other methods. ...
... history, then we should expect to find similar patterns whether we are comparing molecules or bones or any other characteristics. • In practice, the new tools of molecular biology have generally corroborated rather than contradicted evolutionary trees based on comparative anatomy and other methods. ...
Section B2: The Darwinian Revolution (continued) CHAPTER 22
... history, then we should expect to find similar patterns whether we are comparing molecules or bones or any other characteristics. • In practice, the new tools of molecular biology have generally corroborated rather than contradicted evolutionary trees based on comparative anatomy and other methods. ...
... history, then we should expect to find similar patterns whether we are comparing molecules or bones or any other characteristics. • In practice, the new tools of molecular biology have generally corroborated rather than contradicted evolutionary trees based on comparative anatomy and other methods. ...
Nerve activates contraction
... history, then we should expect to find similar patterns whether we are comparing molecules or bones or any other characteristics. • In practice, the new tools of molecular biology have generally corroborated rather than contradicted evolutionary trees based on comparative anatomy and other methods. ...
... history, then we should expect to find similar patterns whether we are comparing molecules or bones or any other characteristics. • In practice, the new tools of molecular biology have generally corroborated rather than contradicted evolutionary trees based on comparative anatomy and other methods. ...
Activities
... great variety of gene combinations that can be used to make predictions about the potential traits of offspring. some new gene combinations make little difference, some can produce offspring with new and perhaps enhanced capabilities, while some may reduce the ability of the offspring to survive. th ...
... great variety of gene combinations that can be used to make predictions about the potential traits of offspring. some new gene combinations make little difference, some can produce offspring with new and perhaps enhanced capabilities, while some may reduce the ability of the offspring to survive. th ...
Punctuated equilibrium comes of age
... communication) offer an interesting speciational alternative: if extinction intensities were constant through time, groups with equally high speciation and extinction rates would fare just as well as groups with equally lower rates. But extinction intensities vary greatly, and the geological record ...
... communication) offer an interesting speciational alternative: if extinction intensities were constant through time, groups with equally high speciation and extinction rates would fare just as well as groups with equally lower rates. But extinction intensities vary greatly, and the geological record ...
Chapter 6: Adaptations over Time
... Darwin’s Theory Darwin’s observations led many other scientists to conduct experiments on inherited characteristics. After many years, Darwin’s ideas became known as the theory of evolution by natural selection. Natural selection means that organisms with traits best suited to their environment are ...
... Darwin’s Theory Darwin’s observations led many other scientists to conduct experiments on inherited characteristics. After many years, Darwin’s ideas became known as the theory of evolution by natural selection. Natural selection means that organisms with traits best suited to their environment are ...
Cat. 3 Questions
... The leg structures of many di erent vertebrates are quite similar in number and location of bones. Most scientists would probably explain this on the basis of ...
... The leg structures of many di erent vertebrates are quite similar in number and location of bones. Most scientists would probably explain this on the basis of ...
S 7.3 Biological evolution accounts for the diversity of species
... huge armies. In Argentina, he saw sloths, animals that moved very slowly and spent much of their time hanging in trees. Today scientists know that organisms are even more diverse than Darwin could ever have imagined. Scientists have identified more than 1. 7 million species of organisms on Earth. A ...
... huge armies. In Argentina, he saw sloths, animals that moved very slowly and spent much of their time hanging in trees. Today scientists know that organisms are even more diverse than Darwin could ever have imagined. Scientists have identified more than 1. 7 million species of organisms on Earth. A ...
Chapter 15: Evolution
... equipped for survival than others. Those less equipped would die. Here, finally, was the framework for a new theory about the origin of species. Darwin’s theory has four basic principles that explain how traits of a population can change over time. First, individuals in a population show differences ...
... equipped for survival than others. Those less equipped would die. Here, finally, was the framework for a new theory about the origin of species. Darwin’s theory has four basic principles that explain how traits of a population can change over time. First, individuals in a population show differences ...
Evolution and Speciation
... been suggested and debated well before Darwin. The view that species were static and unchanging was grounded in the writings of Plato, yet there were also ancient Greeks that expressed evolutionary ideas. In the eighteenth century, ideas about the evolution of animals were reintroduced by the natura ...
... been suggested and debated well before Darwin. The view that species were static and unchanging was grounded in the writings of Plato, yet there were also ancient Greeks that expressed evolutionary ideas. In the eighteenth century, ideas about the evolution of animals were reintroduced by the natura ...
Recombination and the Divergence of Hybridizing
... In a variety of other organisms, however, the genetic relationships between host performance and preference are not as clear as suggested by Hawthorne and Via (2001). In some cases, genes affecting for example larval performance on hosts are unlinked to those affecting adult oviposition preferences. ...
... In a variety of other organisms, however, the genetic relationships between host performance and preference are not as clear as suggested by Hawthorne and Via (2001). In some cases, genes affecting for example larval performance on hosts are unlinked to those affecting adult oviposition preferences. ...
Evolution by Natural Selection
... the biologist Jean-Baptiste de Lamarck proposed the first formal theory of evolution—that species are not static but change through time. However, the pattern component of Lamarck’s theory was initially based on the scale of nature. When he started his work on evolution, Lamarck claimed that simple ...
... the biologist Jean-Baptiste de Lamarck proposed the first formal theory of evolution—that species are not static but change through time. However, the pattern component of Lamarck’s theory was initially based on the scale of nature. When he started his work on evolution, Lamarck claimed that simple ...
Teacher`s guide
... The student will be able to understand the role of natural selection and mutations in evolution, show current examples of natural selection, its similarity to artificial selection and understand how sciences like compared anatomy provided evidence for evolutionary theory. Likewise, the student is ex ...
... The student will be able to understand the role of natural selection and mutations in evolution, show current examples of natural selection, its similarity to artificial selection and understand how sciences like compared anatomy provided evidence for evolutionary theory. Likewise, the student is ex ...
Evidence of common descent
Evidence of common descent of living organisms has been discovered by scientists researching in a variety of disciplines over many decades and has demonstrated common descent of all life on Earth developing from a last universal ancestor. This evidence explicates that evolution does occur, and is able to show the natural processes by which the biodiversity of life on Earth developed. Additionally, this evidence supports the modern evolutionary synthesis—the current scientific theory that explains how and why life changes over time. Evolutionary biologists document evidence of common descent by making testable predictions, testing hypotheses, and developing theories that illustrate and describe its causes.Comparison of the DNA genetic sequences of organisms has revealed that organisms that are phylogenetically close have a higher degree of DNA sequence similarity than organisms that are phylogenetically distant. Further evidence for common descent comes from genetic detritus such as pseudogenes, regions of DNA that are orthologous to a gene in a related organism, but are no longer active and appear to be undergoing a steady process of degeneration from cumulative mutations.Fossils are important for estimating when various lineages developed in geologic time. As fossilization is an uncommon occurrence, usually requiring hard body parts and death near a site where sediments are being deposited, the fossil record only provides sparse and intermittent information about the evolution of life. Scientific evidence of organisms prior to the development of hard body parts such as shells, bones and teeth is especially scarce, but exists in the form of ancient microfossils, as well as impressions of various soft-bodied organisms. The comparative study of the anatomy of groups of animals shows structural features that are fundamentally similar or homologous, demonstrating phylogenetic and ancestral relationships with other organisms, most especially when compared with fossils of ancient extinct organisms. Vestigial structures and comparisons in embryonic development are largely a contributing factor in anatomical resemblance in concordance with common descent. Since metabolic processes do not leave fossils, research into the evolution of the basic cellular processes is done largely by comparison of existing organisms' physiology and biochemistry. Many lineages diverged at different stages of development, so it is possible to determine when certain metabolic processes appeared by comparing the traits of the descendants of a common ancestor. Universal biochemical organization and molecular variance patterns in all organisms also show a direct correlation with common descent.Further evidence comes from the field of biogeography because evolution with common descent provides the best and most thorough explanation for a variety of facts concerning the geographical distribution of plants and animals across the world. This is especially obvious in the field of insular biogeography. Combined with the theory of plate tectonics common descent provides a way to combine facts about the current distribution of species with evidence from the fossil record to provide a logically consistent explanation of how the distribution of living organisms has changed over time.The development and spread of antibiotic resistant bacteria, like the spread of pesticide resistant forms of plants and insects provides evidence that evolution due to natural selection is an ongoing process in the natural world. Alongside this, are observed instances of the separation of populations of species into sets of new species (speciation). Speciation has been observed directly and indirectly in the lab and in nature. Multiple forms of such have been described and documented as examples for individual modes of speciation. Furthermore, evidence of common descent extends from direct laboratory experimentation with the selective breeding of organisms—historically and currently—and other controlled experiments involving many of the topics in the article. This article explains the different types of evidence for evolution with common descent along with many specialized examples of each.