Chapter 15
... Potassium-40, with a half-life of 1.3 billion years, can be used to date volcanic rocks that are hundreds of millions of years old – A fossil’s age can be inferred from the ages of the rock layers above and below the strata in which the fossil is found ...
... Potassium-40, with a half-life of 1.3 billion years, can be used to date volcanic rocks that are hundreds of millions of years old – A fossil’s age can be inferred from the ages of the rock layers above and below the strata in which the fossil is found ...
Unit #1: Evolution - Achievement First
... composition and provide evidence of convergent evolution of species not closely related but found in similar environments. Phylogenetic trees are graphical representations or models of evolutionary history Phylogenetic trees can be constructed based on morphological and molecular evidence Phylogenet ...
... composition and provide evidence of convergent evolution of species not closely related but found in similar environments. Phylogenetic trees are graphical representations or models of evolutionary history Phylogenetic trees can be constructed based on morphological and molecular evidence Phylogenet ...
Evolutionary Classification
... Evolution- gradual change in a species over time- sci. theory Theory-well-tested explanation that explains a wide range of observations. Adaptation- any trait that helps an organism survive and reproduce ...
... Evolution- gradual change in a species over time- sci. theory Theory-well-tested explanation that explains a wide range of observations. Adaptation- any trait that helps an organism survive and reproduce ...
File
... very similar in structure, but are used for a different function. For example, human hand bones and bird wing bones are very similar in structure, but humans use their hands to grab while birds use their wings to fly. The more homologous structures two species have in common, the more closely relate ...
... very similar in structure, but are used for a different function. For example, human hand bones and bird wing bones are very similar in structure, but humans use their hands to grab while birds use their wings to fly. The more homologous structures two species have in common, the more closely relate ...
Chapters 13/14 Power Point
... of Evolution • Although complete fossil histories for living organisms are rare, an organism’s history is written in the sequence of nucleotides making up its DNA • If species have changed over time, their genes should also have changed • The theory of evolution predicts that genes will accumulate m ...
... of Evolution • Although complete fossil histories for living organisms are rare, an organism’s history is written in the sequence of nucleotides making up its DNA • If species have changed over time, their genes should also have changed • The theory of evolution predicts that genes will accumulate m ...
(1) natural selection
... came about? (1) Different adaptations developed because the kit fox preferred hotter environments than the red fox. (2) As the foxes adapted to different environments, differences in appearance evolved. (3) The foxes evolved differently to prevent overpopulation of the forest habitat. (4) The foxes ...
... came about? (1) Different adaptations developed because the kit fox preferred hotter environments than the red fox. (2) As the foxes adapted to different environments, differences in appearance evolved. (3) The foxes evolved differently to prevent overpopulation of the forest habitat. (4) The foxes ...
AS Variation - Skinners` School Physics
... Amino acid sequences in cytochrome c (used in respiration). Species with same amino acid sequences are closely related, the bigger the differences the less closely related they are and the further back they diverged DNA and RNA polymerase are made of basic polypeptide chains in all organisms but hig ...
... Amino acid sequences in cytochrome c (used in respiration). Species with same amino acid sequences are closely related, the bigger the differences the less closely related they are and the further back they diverged DNA and RNA polymerase are made of basic polypeptide chains in all organisms but hig ...
Spontaneous Generation
... better able to avoid shading by others, they will produce more offspring. However, if the reason they grow tall is because of the soil in which their seeds happened to land, and not because they have the genes to grow tall, than no evolution will occur. • If some individuals are fleeter than others ...
... better able to avoid shading by others, they will produce more offspring. However, if the reason they grow tall is because of the soil in which their seeds happened to land, and not because they have the genes to grow tall, than no evolution will occur. • If some individuals are fleeter than others ...
or biologic succession
... Yet, since the concept of Natural Selection is a scientific one, that is, it is TESTABLE, it made some predictions. ...
... Yet, since the concept of Natural Selection is a scientific one, that is, it is TESTABLE, it made some predictions. ...
Evolution, Change and Diversity
... plate tectonics Pangea supercontinent 225 million years ago ...
... plate tectonics Pangea supercontinent 225 million years ago ...
EVOLUTION UNIT 7A Part 1 of 2
... different organisms • A sign that vertebrates evolved from a common ancestor: all of them have have an embryonic stage in which gill pouches appear on sides of throat • At this stage, embryos of fish, frogs, snakes, birds & apes look more alike than different. • As development progresses, the verteb ...
... different organisms • A sign that vertebrates evolved from a common ancestor: all of them have have an embryonic stage in which gill pouches appear on sides of throat • At this stage, embryos of fish, frogs, snakes, birds & apes look more alike than different. • As development progresses, the verteb ...
Evolution - Parma City School District
... • Populations vary by the frequency of inheritable traits from one generation to the next • Traits are represented by alleles • Alleles may modify morphology (form or structure), physiology, or behavior • Evolution = changes in allele frequency over time ...
... • Populations vary by the frequency of inheritable traits from one generation to the next • Traits are represented by alleles • Alleles may modify morphology (form or structure), physiology, or behavior • Evolution = changes in allele frequency over time ...
Darwin - Integrative Biology
... • geology: earth is old (hence time for evolution to produce the huge diversity of living organisms) and accumulation of slow changes over long periods leads to creation of valleys, mountains, etc. (metaphor for natural selection and creation of new species) • structural homologies that indicate clo ...
... • geology: earth is old (hence time for evolution to produce the huge diversity of living organisms) and accumulation of slow changes over long periods leads to creation of valleys, mountains, etc. (metaphor for natural selection and creation of new species) • structural homologies that indicate clo ...
Evidence of Evolution
... – Individuals best suited for their environment will survive and reproduce more successfully. – These organisms pass their heritable traits to their offspring. Other individuals die or leave fewer offspring. – This process of natural selection causes species to change over time. 5) Species alive tod ...
... – Individuals best suited for their environment will survive and reproduce more successfully. – These organisms pass their heritable traits to their offspring. Other individuals die or leave fewer offspring. – This process of natural selection causes species to change over time. 5) Species alive tod ...
Evolution and Biodiversity - Environmental
... A. Populations evolve by becoming genetically different. B. All species descend from earlier, ancestral species—theory of evolution. C. Microevolution describes the small genetic changes that occur in a population over time. 1. Over time, a population’s gene pool changes when mutations (beneficial c ...
... A. Populations evolve by becoming genetically different. B. All species descend from earlier, ancestral species—theory of evolution. C. Microevolution describes the small genetic changes that occur in a population over time. 1. Over time, a population’s gene pool changes when mutations (beneficial c ...
Document
... Behavioral – populations are physically able to mate, but do not due to behavioral issues (ex – different courtship rituals) Temporal – populations mate at different times (one in April, one in June) Mechanical – reproductive organs do not fit correctly 4. Can two populations be separated by more th ...
... Behavioral – populations are physically able to mate, but do not due to behavioral issues (ex – different courtship rituals) Temporal – populations mate at different times (one in April, one in June) Mechanical – reproductive organs do not fit correctly 4. Can two populations be separated by more th ...
Standard B-5 - Wando High School
... It is essential for students to understand that the continuity of life-forms on Earth is based on an organism’s success in passing genes to the next generation. Many organisms that lived long ago resemble those still alive today because the same genetic processes have passed along the genetic materi ...
... It is essential for students to understand that the continuity of life-forms on Earth is based on an organism’s success in passing genes to the next generation. Many organisms that lived long ago resemble those still alive today because the same genetic processes have passed along the genetic materi ...
What is evolution?
... Tomorrow: -Charles Darwin’s findings -Evidence for evolution -species and populations ...
... Tomorrow: -Charles Darwin’s findings -Evidence for evolution -species and populations ...
Evolution History
... b. Moths rest during the daytime on trees. c. In rural areas where the air is clean the trees are covered in lichen. d. The peppered variety is better camouflaged when it rests on these trees. The melanic form is easily seen. e. In industrial areas air is polluted and the lichens die. f. The tree tr ...
... b. Moths rest during the daytime on trees. c. In rural areas where the air is clean the trees are covered in lichen. d. The peppered variety is better camouflaged when it rests on these trees. The melanic form is easily seen. e. In industrial areas air is polluted and the lichens die. f. The tree tr ...
1) UNIT 5 MechanismsOfEvolution
... Example: All of these are used to fly, but are different in structure. 4. ________________________ – the early stages of development are similar in different organisms 5. ____________________________ – bones or organs that are present in an organism but are reduced in size and either have no use o ...
... Example: All of these are used to fly, but are different in structure. 4. ________________________ – the early stages of development are similar in different organisms 5. ____________________________ – bones or organs that are present in an organism but are reduced in size and either have no use o ...
Types of Natural Selection
... different areas? Environmental pressures may cause populations to change over time due to their environment but not enough to form a new species. This is because an organism’s ability to survive in its current environment to adulthood and reproduce will be the one to pass on its genes. And their gen ...
... different areas? Environmental pressures may cause populations to change over time due to their environment but not enough to form a new species. This is because an organism’s ability to survive in its current environment to adulthood and reproduce will be the one to pass on its genes. And their gen ...
evolution—that
... Be able to define Species and the basis for speciation. How do geographic barriers contribute to speciation? Be able to describe the two theories on the Rate of Speciation, and how they differ; similar. Be able to describe Adaptive radiation and Convergent Evolution ...
... Be able to define Species and the basis for speciation. How do geographic barriers contribute to speciation? Be able to describe the two theories on the Rate of Speciation, and how they differ; similar. Be able to describe Adaptive radiation and Convergent Evolution ...
Chapter 15 note - schallesbiology
... had a common ancestor have become more different than each other over time. • Especially rays & sharks. ...
... had a common ancestor have become more different than each other over time. • Especially rays & sharks. ...
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.