Speciation
... 1. What is speciation? Speciation - the origin of new ________________ from pre-existing species. 2. What is a species? Biological Species = A set of naturally genetically reproductively isolated from other sets of populations. ...
... 1. What is speciation? Speciation - the origin of new ________________ from pre-existing species. 2. What is a species? Biological Species = A set of naturally genetically reproductively isolated from other sets of populations. ...
Evidence of Evolution Notes Descent with Modification Each living
... Each living species has descended, with _____________________, from other species over time. o Result: species today look/act _____________________________ from their ancestors ...
... Each living species has descended, with _____________________, from other species over time. o Result: species today look/act _____________________________ from their ancestors ...
Evolution in Populations
... successful mating. For example, in many closely related species of plants, there are certain differences, such as differences in color, that help attract different kinds of pollinators. ...
... successful mating. For example, in many closely related species of plants, there are certain differences, such as differences in color, that help attract different kinds of pollinators. ...
Convergent and Divergent Evolution - Mr. Lesiuk
... pool. After time, it own isolated gene pool undergoes isolated mutations and pressures from natural selection that make that group different from the main group. Sometimes the differences becomes such that even if that population is brought back into the main population, the may either choose not to ...
... pool. After time, it own isolated gene pool undergoes isolated mutations and pressures from natural selection that make that group different from the main group. Sometimes the differences becomes such that even if that population is brought back into the main population, the may either choose not to ...
Chapter 23: An Introduction to Evolution
... embryonic development, meaning that its genes are not expressed is known as what? What forms as the inactivated chromosome? 3. Describe Maternal effect ...
... embryonic development, meaning that its genes are not expressed is known as what? What forms as the inactivated chromosome? 3. Describe Maternal effect ...
PLEASE DO NOT WRITE ON THIS SURVEY
... 1. A population of termites initially consists of darkly colored and brightly colored members. After several generations, the termite’s population consists almost entirely of darkly colored members because the brig ...
... 1. A population of termites initially consists of darkly colored and brightly colored members. After several generations, the termite’s population consists almost entirely of darkly colored members because the brig ...
Practice Exam 4, Biology 211, Fall 2007
... c. The creation of reproductive barriers between related populations. d. Slow, but steady, changes in the genetic makeup of populations over time. e. The appearance in the evolutionary record of novel forms and structures. 20. Which of the following features could not be used to argue that some spec ...
... c. The creation of reproductive barriers between related populations. d. Slow, but steady, changes in the genetic makeup of populations over time. e. The appearance in the evolutionary record of novel forms and structures. 20. Which of the following features could not be used to argue that some spec ...
12 Evolution 2016
... Evolution- change in the allele frequency in a population over time Vestigal Organ- organ that serves no useful function Natural Selection- organisms best suited to their environment will survive; survival of the fittest Homologous Structure- structures that have different mature forms in different ...
... Evolution- change in the allele frequency in a population over time Vestigal Organ- organ that serves no useful function Natural Selection- organisms best suited to their environment will survive; survival of the fittest Homologous Structure- structures that have different mature forms in different ...
Evolution Jeopardy
... He traveled to the Galapagos Islands on the HMS Beagle and observed similar species suited to their particular environment. ...
... He traveled to the Galapagos Islands on the HMS Beagle and observed similar species suited to their particular environment. ...
Evolution Jeopardy
... • Cutting the wings off 50 generations of fruit flies and then having the 51st generation grow long wings disapproves this theory. • What is Lamarck’s theory of “inheritance of acquired characteristics”? ...
... • Cutting the wings off 50 generations of fruit flies and then having the 51st generation grow long wings disapproves this theory. • What is Lamarck’s theory of “inheritance of acquired characteristics”? ...
Biology - BEHS Science
... Inbreeding and asortive mating (both shift frequencies of different genotypes). ...
... Inbreeding and asortive mating (both shift frequencies of different genotypes). ...
Natural selection Differential survival or reproduction of individuals
... Gene (allele) frequency ...
... Gene (allele) frequency ...
Slide 1 - Dr. Tricia Britton
... 2) Adaptation happens through natural selection. The event that causes isolation may also change the environment. The separated populations must adapt to their environments. Each population will have different adaptations. 3) Differentiation ...
... 2) Adaptation happens through natural selection. The event that causes isolation may also change the environment. The separated populations must adapt to their environments. Each population will have different adaptations. 3) Differentiation ...
1CHAPTER 4
... locations of continents, causing some species to be geographically isolated from others. Geographic isolation -when a physical barrier separates a population into groups. -can result from - mountain ranges - volcanic eruptions - lava flows - rivers - earthquakes - deforestation - continents - island ...
... locations of continents, causing some species to be geographically isolated from others. Geographic isolation -when a physical barrier separates a population into groups. -can result from - mountain ranges - volcanic eruptions - lava flows - rivers - earthquakes - deforestation - continents - island ...
Evolutionary biology
... Genetic difference natural selection the more adaptive one should spread the observed degree of variation should be low Most difference among alleles are adaptively neutral and accumulated – the reality ...
... Genetic difference natural selection the more adaptive one should spread the observed degree of variation should be low Most difference among alleles are adaptively neutral and accumulated – the reality ...
Concept Check Questions
... 1. Suggest whether each of the following pairs of structures more likely represents an analogy or a homology, and explain your reasoning: (a) a porcupine’s quills and a cactus’s spines; (b) a cat’s paw and a human’s hand; (c) an owl’s wing and a hornet’s wing. 2. Which of the following are more like ...
... 1. Suggest whether each of the following pairs of structures more likely represents an analogy or a homology, and explain your reasoning: (a) a porcupine’s quills and a cactus’s spines; (b) a cat’s paw and a human’s hand; (c) an owl’s wing and a hornet’s wing. 2. Which of the following are more like ...
9/25
... a. No – selection of most fit mutations b. Mutations are random, not selection 14. Difference between anology and homology. a. Related species should have similar characteristics b. Based on homology (similarities due to shared ancestry) not analogy (similarities not from shared ancestry: convergent ...
... a. No – selection of most fit mutations b. Mutations are random, not selection 14. Difference between anology and homology. a. Related species should have similar characteristics b. Based on homology (similarities due to shared ancestry) not analogy (similarities not from shared ancestry: convergent ...
Evolution - 10asciencetvs
... • Level E: state Darwin’s Theory of Evolution • Level D: state Darwin’s Theory of Evolution and describe two observations that lead to his theory • Level C: explain Darwin’s Theory of Evolution and apply it to classification of species ...
... • Level E: state Darwin’s Theory of Evolution • Level D: state Darwin’s Theory of Evolution and describe two observations that lead to his theory • Level C: explain Darwin’s Theory of Evolution and apply it to classification of species ...
Evolution - gomezbiomccaskey
... Convergent Evolution – when species that are not closely related evolve similar traits (two species look like they are closely related and they are not) • Example: dolphins (mammals) and sharks ...
... Convergent Evolution – when species that are not closely related evolve similar traits (two species look like they are closely related and they are not) • Example: dolphins (mammals) and sharks ...
Bottleneck effect - Madeira City Schools
... 2. Sympatric Speciation – “Same Country” a. How can reproductive barriers between populations evolve when the members remain in contact with each other? b. Switching habitat, food source, or other resource not used by the parent population c. When two species interbreed and produce a hybrid that go ...
... 2. Sympatric Speciation – “Same Country” a. How can reproductive barriers between populations evolve when the members remain in contact with each other? b. Switching habitat, food source, or other resource not used by the parent population c. When two species interbreed and produce a hybrid that go ...
Speciation Notes
... Population or groups of populations whose members have the potential to interbreed and produce fertile offspring ...
... Population or groups of populations whose members have the potential to interbreed and produce fertile offspring ...
Koinophilia
Koinophilia is an evolutionary hypothesis concerning sexual selection which proposes that animals seeking mate preferentially choose individuals with a minimum of unusual features. Koinophilia intends to explain the clustering of organisms into species and other issues described by Darwin's Dilemma. The term derives from the Greek, koinos, ""the usual"", and philos, ""fondness"".Natural selection causes beneficial inherited features to become more common and eventually replace their disadvantageous counterparts. A sexually-reproducing animal would be expected to avoid individuals with unusual features, and to prefer to mate with individuals displaying a predominance of common or average features. This means that mates displaying mutant features are also avoided. This is advantageous because most mutations that manifest themselves as changes in appearance, functionality or behavior, are disadvantageous. Because it is impossible to judge whether a new mutation is beneficial or not, koinophilic animals avoid them all, at the cost of avoiding the occasional beneficial mutation. Thus, koinophilia, although not infallible in its ability to distinguish fit from unfit mates, is a good strategy when choosing a mate. A koinophilic choice ensures that offspring are likely to inherit features that have been successful in the past.Koinophilia differs from assortative mating, where ""like prefers like"". If like preferred like, leucistic animals (such as white peacocks) would be sexually attracted to one another, and a leucistic subspecies would come into being. Koinophilia predicts that this is unlikely because leucistic animals are attracted to the average in the same way as other animals. Since non-leucistic animals are not attracted by leucism, few leucistic individuals find mates, and leucistic lineages will rarely form.Koinophilia provides simple explanations for the rarity of speciation (in particular Darwin's Dilemma), evolutionary stasis, punctuated equilibria, and the evolution of cooperation. Koinophilia might also contribute to the maintenance of sexual reproduction, preventing its reversion to the much simpler and inherently more advantageous asexual form of reproduction.The koinophilia hypothesis is supported by research into the physical attractiveness of human faces by Judith Langlois and her co-workers. They found that the average of two human faces was more attractive than either of the faces from which that average was derived. The more faces (of the same gender and age) that were used in the averaging process the more attractive and appealing the average face became. This work into averageness supports koinophilia as an explanation of what constitutes a beautiful face, and how the individuality of a face is recognized.