Evolution Cont`d
... Definitions • Homologous structures – structural similarities species share from a common ancestor • Vestigial structures – are remnants of structures that may have had important functions in an ancestral species, but have no clear function in modern descendant. ...
... Definitions • Homologous structures – structural similarities species share from a common ancestor • Vestigial structures – are remnants of structures that may have had important functions in an ancestral species, but have no clear function in modern descendant. ...
Topic 1 textbook HW
... a. They had descended with modification from a common mainland ancestor. b. They had descended with modification from several different mainland ancestors. c. They had remained unchanged since arriving on the Galápagos from the mainland. d. They had become more similar to one another after arriving ...
... a. They had descended with modification from a common mainland ancestor. b. They had descended with modification from several different mainland ancestors. c. They had remained unchanged since arriving on the Galápagos from the mainland. d. They had become more similar to one another after arriving ...
Special Speciation - UNI ScholarWorks
... Speciation occurs when separate populations become so genetically different that they can no longer mate successfully with each other. This can occur in different ways for different species, but most commonly geographic isolation (e.g., by mountains, oceans, or rivers) is an important part of the pr ...
... Speciation occurs when separate populations become so genetically different that they can no longer mate successfully with each other. This can occur in different ways for different species, but most commonly geographic isolation (e.g., by mountains, oceans, or rivers) is an important part of the pr ...
Evolution & Populations
... evolved from one form to another, but had no plausible process to make it happen. – The theory of natural selection is just that! ...
... evolved from one form to another, but had no plausible process to make it happen. – The theory of natural selection is just that! ...
Evolution and Classification
... Some domesticated animals die because the environment cannot support them all. ...
... Some domesticated animals die because the environment cannot support them all. ...
Mechanisms of Evolution: Natural Selection
... An adaptation is a feature that is common in a population because it provides some improved function. Adaptations are well fitted to their function and produced by natural selection. Remember, individuals do not form adaptations!! Adaptations are the result of natural selection. The most suita ...
... An adaptation is a feature that is common in a population because it provides some improved function. Adaptations are well fitted to their function and produced by natural selection. Remember, individuals do not form adaptations!! Adaptations are the result of natural selection. The most suita ...
unit 7 – history and organization of biological diversity
... A. Comparative Anatomy – studying the structural differences and similarities between organisms (see fig. 15.6, page 425 and table 15.2, page 425) 1. homologous structures – same anatomy (like having a radius and an ulna), maybe different function, but probably they have a common ancestor and simila ...
... A. Comparative Anatomy – studying the structural differences and similarities between organisms (see fig. 15.6, page 425 and table 15.2, page 425) 1. homologous structures – same anatomy (like having a radius and an ulna), maybe different function, but probably they have a common ancestor and simila ...
dogs
... wolves many times before. In fact, their arrival is almost ritualistic. They move in from the forest and wait until all the humans have gone into the cave for the night. The boy notices that the same wolf is the first one to get to the good scraps. It doesn’t immediately run off when it sees the boy ...
... wolves many times before. In fact, their arrival is almost ritualistic. They move in from the forest and wait until all the humans have gone into the cave for the night. The boy notices that the same wolf is the first one to get to the good scraps. It doesn’t immediately run off when it sees the boy ...
Exhibit 10 - Horizon Research, Inc.
... Individual organisms with certain traits in particular environments are more likely than others to survive and have offspring. Organisms inherit their traits from their parents. An individual with a trait that results in an advantage for survival and reproduction is more likely to have offspring ...
... Individual organisms with certain traits in particular environments are more likely than others to survive and have offspring. Organisms inherit their traits from their parents. An individual with a trait that results in an advantage for survival and reproduction is more likely to have offspring ...
013368718X_CH16_247
... 18. When individuals from a mainland bird population immigrate to various islands, natural selection may result in closely related, but ...
... 18. When individuals from a mainland bird population immigrate to various islands, natural selection may result in closely related, but ...
Modern toothed whales - Sonoma Valley High School
... – Structures with different appearances and functions that all derived from the same body part in a common ancestor – The bones in the forelimb of mammals are homologous structures – Different functions, same ancestor structure ...
... – Structures with different appearances and functions that all derived from the same body part in a common ancestor – The bones in the forelimb of mammals are homologous structures – Different functions, same ancestor structure ...
Natural Selection
... populations • SEXUAL REPRODUCTION introduces new gene combinations • Random MUTATIONS in DNA lead to the formation of new alleles (sound familiar?) ...
... populations • SEXUAL REPRODUCTION introduces new gene combinations • Random MUTATIONS in DNA lead to the formation of new alleles (sound familiar?) ...
Science 10th grade LEARNING OBJECT Do species evolve
... 3). Mosaic (or modular) evolution: Tarancón (2013) suggests that “certain structures possess a rate of evolution or modification greater than the rest of structures of the same individual. This is why these individuals may preserve structures from their ancestors but at the same time incorporate ne ...
... 3). Mosaic (or modular) evolution: Tarancón (2013) suggests that “certain structures possess a rate of evolution or modification greater than the rest of structures of the same individual. This is why these individuals may preserve structures from their ancestors but at the same time incorporate ne ...
evolution-webquest
... new destination or people moving to new cities or countries. If ______________ are carried to a population where those genes previously did not __________________, ____________________ can be a very important source of genetic ___________________. In the graphic on the website, the gene for ________ ...
... new destination or people moving to new cities or countries. If ______________ are carried to a population where those genes previously did not __________________, ____________________ can be a very important source of genetic ___________________. In the graphic on the website, the gene for ________ ...
EvolutionNotes - WordPress.com
... Miller and Urey Experiment (1953) • Proved Oparin and Haldane Theory, that life could come from non-living things Details of the experiment: They took methane, ammonia, water and hydrogen and placed them in a flask. They exposed the flask to sparks to represent the sunlight and lightening on the ea ...
... Miller and Urey Experiment (1953) • Proved Oparin and Haldane Theory, that life could come from non-living things Details of the experiment: They took methane, ammonia, water and hydrogen and placed them in a flask. They exposed the flask to sparks to represent the sunlight and lightening on the ea ...
Evolution-Chapter 11
... Can’t find a mate Humans do it to better a product / make an animal more interesting and ...
... Can’t find a mate Humans do it to better a product / make an animal more interesting and ...
Homework one
... One copy has to be turned into Dr. Feaver at the beginning of class. Late copies are not accepted. Lined paper must be used and writing must be legible. If I have trouble reading your paper, your grade on those question affected will be 0. You are highly encouraged to draft your homework assignments ...
... One copy has to be turned into Dr. Feaver at the beginning of class. Late copies are not accepted. Lined paper must be used and writing must be legible. If I have trouble reading your paper, your grade on those question affected will be 0. You are highly encouraged to draft your homework assignments ...
Document
... lucky enough to have the ‘right’ beak for the new food – eat, grow, develop, reproduce & pass on that “beak” trait. Over time, more & more of the finches have the ‘new’ beak A new species of finch begins. ...
... lucky enough to have the ‘right’ beak for the new food – eat, grow, develop, reproduce & pass on that “beak” trait. Over time, more & more of the finches have the ‘new’ beak A new species of finch begins. ...
Tempo and mode - Integrative Biology
... •Adaptive radiations adaptive radiation: The evolutionary divergence of members of a single phylogenetic line into a variety of different adaptive forms, usually with reference to diversification in the use of resources and habitats. • Adaptive radiations may obscure homologies, since homologous tr ...
... •Adaptive radiations adaptive radiation: The evolutionary divergence of members of a single phylogenetic line into a variety of different adaptive forms, usually with reference to diversification in the use of resources and habitats. • Adaptive radiations may obscure homologies, since homologous tr ...
A. Historical Context for Evolutionary Theory
... The former proposed that body parts used extensively to cope with the environment became larger and stronger, while those not used deteriorated. ...
... The former proposed that body parts used extensively to cope with the environment became larger and stronger, while those not used deteriorated. ...
16_4 - Mater Academy of International Studies
... The hipbones of bottlenose dolphins are vestigial structures. In their ancestors, hipbones played a role in terrestrial locomotion. However, as the dolphin lineage adapted to life at sea, this function was lost. Why would an organism possess structures with little or no function? One possibility is ...
... The hipbones of bottlenose dolphins are vestigial structures. In their ancestors, hipbones played a role in terrestrial locomotion. However, as the dolphin lineage adapted to life at sea, this function was lost. Why would an organism possess structures with little or no function? One possibility is ...
Sample Test Questions -- Midterm 2 - People
... 3. Which of the following is NOT one of the premises on which evolution by natural selection is based? a. Organisms usually produce many more offspring than the environment can support. b. Most natural populations remain approximately the same size through time. c. Organisms can alter their genes to ...
... 3. Which of the following is NOT one of the premises on which evolution by natural selection is based? a. Organisms usually produce many more offspring than the environment can support. b. Most natural populations remain approximately the same size through time. c. Organisms can alter their genes to ...
Study Guide / Tips for Test
... 18. Use the image taken from our textbook to explain which two groups of primates would be considered the most closely related. Explain why. ...
... 18. Use the image taken from our textbook to explain which two groups of primates would be considered the most closely related. Explain why. ...
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.