BROCK UNIVERSITY Final Examination Course: ERSC 1F90 Date of Examination: April 21, 2011 Time of Examination: 19:00-22:00 Number of Pages: 7 Number of Students: 468 Examination Time: 3 hours Instructor: Hess No examination aids other than those specified on the examination script are permitted. NO TEXTING!!! Use or possession of unauthorized materials or use of any device other than those specified will automatically result in the award of a ZERO GRADE for this examination. This means you
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What is microevolution? Macroevolution? What are the two theories of macroevolution? What are the three types of gradualism? What is punctuated equilibrium? What is a biological species? What is allopatric speciation? What conditions favor allopatric speciation? Sympatric speciation? What is autopolyploidy? Allopolyploidy? What is a hybrid zone? What are the three outcomes? What is the origin of novelty? (exaptations) What is evo-devo? What is allometric growth, heterochrony, paediomorphosis
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polyploidy is a route to evolutionary success. A recent study (3) confirmed the ubiquity of polyploidy, with about 35% of vascular plant species being recent polyploids (“neopolyploids,” having formed since their genus arose), representing 15% of speciation events in flowering plants and 31% in ferns. It remains unknown, however, whether the abundance of polyploids is a consequence of higher diversification rates following polyploidy or of frequent polyploid formation. We estimated diversification
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Name: Gertrude Edwards Date: 12/1/2014 Instructor’s Name: Staci Lynn Assignment: SCI203 Phase 2 Lab Report TITLE: Speciation • Purpose o The purpose of this lab is to evaluate what would happen if a species within a population were suddenly split into 2 groups. • Introduction o If a population is divided indefinitely by a barrier members of the divided population will not have the opportunity to breed with each other, over years, the biotic and abiotic
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equilibrium implies a prediction about patterns of genetic differences among many species. It predicts that many evolutionary changes takes place in a short span of time and is tied to speciation events.” Punctuated equilibrium predicts that the fossil record at any one site is unlikely to record the process of speciation. If a site records that the ancestral species lived there, the new species would probably be evolving somewhere else. The small size of the isolated population which is evolving into
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Lecture 11 Biological Species Concept Speciation: the process in which one species splits into 2 or more species Microevolution: changes in allele frequency in a population Macroevolution: Broad pattern of evolution above the species level Species: a group of populations that are able to interbreed and produce viable fertile offspring. -Gene flow within a population holds members of the population together genetically Reproductive Isolation: Barriers that prevent members of different species
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Introduction Speciation is the evolutionary process which occurs when a lineage split occurs in a species resulting in a new biological species. There are many ways by which speciation occurs 1) Allopatric specification; there are two types included in this type. Dicopatric speciation occurs when a species is isolated from each-other by geographical means and form subpopulations, if they remain separated for a long enough period of time they become genetically different that inter-breeding between
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Kittis while the species found on Nevis has been classified as Scirius Nevile. There are three main factors that contribute to the separation of the three distinct species of these rodents. These factors are the bottleneck effect; allopatric speciation, and behavioral isolation. These rodents both started off as one common species classified under the common tree squirrel genus. A bottleneck effect occurs when a population undergoes a dramatic decrease in size. This is often attributed
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non-overlapping geographic areas. Allopatric populations of related organisms are unable to interbreed because of geographic separation. The development of new species as a result of the geographic separation of populations is called allopatric speciation. Ornithologists: is a branch of zoology that concerns the study of birds. Several aspects of ornithology differ from related disciplines, due partly to the
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non-overlapping geographic areas. Allopatric populations of related organisms are unable to interbreed because of geographic separation. The development of new species as a result of the geographic separation of populations is called allopatric speciation. Ornithologists: is a branch of zoology that concerns the study of birds. Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. Most marked among these is the
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