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BIOL 1442 Study Guide Exam 1

by: Maya Adetula

BIOL 1442 Study Guide Exam 1 BIOL 1442

Marketplace > University of Texas at Arlington > BIOL 1442 > BIOL 1442 Study Guide Exam 1
Maya Adetula

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Study guide for first exam
Evolution and Ecology
Dr. Jill DeVito
Study Guide
Biology: Ecology and Evolution
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This 3 page Study Guide was uploaded by Maya Adetula on Thursday September 15, 2016. The Study Guide belongs to BIOL 1442 at University of Texas at Arlington taught by Dr. Jill DeVito in Fall 2016. Since its upload, it has received 172 views.


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Date Created: 09/15/16
Study Guide Exam #1 Terms: Neoteny: the retention of juvenile features in the adult mammal Allopatric Speciation: when populations of the same species become isolated from each other and form distinct characteristics Sympatric Speciation: process through which new species evolve from the same ancestor while sharing the same geographical region Prezygotic barrier: evolutionary adaptation that prevents hybridization before fertilization Postzygotic barrier: biological accidents that can result in zero or decreased fitness Vestigial structures: serve little if any purpose, structures that have lost most of their ancestral function Frequency dependent selection: Founder effect: the reduced genetic diversity that results when an isolated group starts a new population with no further gene flow from the source population Gene flow: transfer of genes from one population to another Evolutionary adaptation: physical feature that helps an animal pass on its genes that has been shaped by evolution/natural selection Female choice: phenomenon that leads to brightly colored males with ornamentation Male competition: phenomenon that leads to aggressive, extra-large males equipped with weaponry Clade: a branch on the tree of life, which includes all descendants of a common ancestor Cline: graded variation in a trait that parallels environmental gradient Bottleneck effect: sudden event dramatically reduces population size at random Polymorphism: existence of 2 or more discrete forms each represented in a population Fitness: an organism’s ability to survive and reproduce Directional selection: natural selection that favors individuals at one end of the phenotypic range (one direction at a given time) Diversifying selection: favors individuals on both extremes of phenotypic range Homology: what allows whales, bats, apes, and cats to share the same forelimb bones Convergent evolution: adaptations in different species are similar only due to similar lifestyles Know how to calculate the frequency of alleles in a population (percentage wise) Know these scientists and their main contributions: Carolus Linnaeus: wanted to identify similarities in different organisms and lump them into groups, invented the binomial classification system Georges Cuvier: found fossils in large layers of rock called strata James Hutton: proposed that geological processes occur very slowly; called this gradualism Jean Baptist Lamarck: supported the idea that species change over time but thought it happened via the inheritance of acquired characteristics Thomas Malthus: observed that if there is a set amount of resources available and the population continues to grow there will be more competition and poverty Charles Lyell: proponent of uniformitarianism (further development of Hutton’s Gradualism) – past geological events operated at the same rate as current processes Charles Darwin: developed the theory of evolution and natural selection A.R. Wallace: independently developed similar theories for evolution and natural selection as Darwin Review concepts to prepare for true false questions: Genetic drift, gene flow, adaptive radiation, first organisms on earth, phenotypic and genetic variation


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