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Evolution - whitburnscience
... non random processes of natural selection and sexual selection. • Variation in genetic makeup can arise as a result of mutation. • Mutation is the original source of new sequences of DNA. • Most mutations are harmful/neutral but occasionally can be beneficial to the fitness of an individual. • Fitne ...
... non random processes of natural selection and sexual selection. • Variation in genetic makeup can arise as a result of mutation. • Mutation is the original source of new sequences of DNA. • Most mutations are harmful/neutral but occasionally can be beneficial to the fitness of an individual. • Fitne ...
Introduction to Evolution
... on his travels…..DIVERSITY! • Puzzled by where different species lived and did not live. • Noticed all organisms had traits to help them survive in their environment. ...
... on his travels…..DIVERSITY! • Puzzled by where different species lived and did not live. • Noticed all organisms had traits to help them survive in their environment. ...
Ch 22 Notes
... “evolution.” Finished major points in 1844… but didn’t publish it (afraid of the consequences for his family – thought they’d be shunned). Until 1858… when he received a letter from Alfred Wallace… then he decided to publish his essay. He was shunned, but over time his ideas were accepted. Now they ...
... “evolution.” Finished major points in 1844… but didn’t publish it (afraid of the consequences for his family – thought they’d be shunned). Until 1858… when he received a letter from Alfred Wallace… then he decided to publish his essay. He was shunned, but over time his ideas were accepted. Now they ...
15-1 The Puzzle of Life`s Diversity
... Idea known as Gradualism These changes caused certain species of life to become extinct. ...
... Idea known as Gradualism These changes caused certain species of life to become extinct. ...
Evolution Advanced Levels of Selection Where does evolution act
... Mating systems: monogamy/polygyny (harem)/polyandry (one female, lots of males)/polygamy (both sexes several partners) Social mating system ≠ genetic mating system bastard, in humans every 20th not father child means it is Measurement survivorship etc variance for quantitative measurement: eg re ...
... Mating systems: monogamy/polygyny (harem)/polyandry (one female, lots of males)/polygamy (both sexes several partners) Social mating system ≠ genetic mating system bastard, in humans every 20th not father child means it is Measurement survivorship etc variance for quantitative measurement: eg re ...
open letter - Chelt Fems
... Violence Against Women and Girls is a disease that infects all societies at all levels, and we each have a duty to acknowledge and tackle it. It is with this in mind that we urge readers to consider the impact of CBC’s decision to allow sexual entertainment venues in Cheltenham town centre. CBC are ...
... Violence Against Women and Girls is a disease that infects all societies at all levels, and we each have a duty to acknowledge and tackle it. It is with this in mind that we urge readers to consider the impact of CBC’s decision to allow sexual entertainment venues in Cheltenham town centre. CBC are ...
Assignment 1 - Matthew C Keller`s
... primary evidence from each domain in a way that non-scientists can understand. Final grades will reflect not only the accuracy and inclusiveness of the piece, but also its organization and effectiveness in communication. I will assign the topics after the first class period, but students can write d ...
... primary evidence from each domain in a way that non-scientists can understand. Final grades will reflect not only the accuracy and inclusiveness of the piece, but also its organization and effectiveness in communication. I will assign the topics after the first class period, but students can write d ...
Simpson, J. A., and
... and emotional investment. Individuals who score high on the SOI have an unrestricted sociosexual orientation. These individuals report having a larger number of different sexual partners in the past year, anticipate having more partners in the next 5 years, have had more one-night stands (“hook-ups” ...
... and emotional investment. Individuals who score high on the SOI have an unrestricted sociosexual orientation. These individuals report having a larger number of different sexual partners in the past year, anticipate having more partners in the next 5 years, have had more one-night stands (“hook-ups” ...
Evolution 4
... Charles Darwin and Natural Selection • The modern theory of evolution is the fundamental concept in biology. • Recall that evolution is the change in populations over time. ...
... Charles Darwin and Natural Selection • The modern theory of evolution is the fundamental concept in biology. • Recall that evolution is the change in populations over time. ...
Darwin’s Theory of Evolution
... Struggle for Existence • Darwin was convinced artificial selection worked in nature as the result of overproduction and competition for resources = struggle for existence (members of each species compete regularly to obtain food, living space, and other necessities of life) – Depends on an individu ...
... Struggle for Existence • Darwin was convinced artificial selection worked in nature as the result of overproduction and competition for resources = struggle for existence (members of each species compete regularly to obtain food, living space, and other necessities of life) – Depends on an individu ...
File - Down the Rabbit Hole
... be supported by the environment leads to a struggle for existence among individuals, with only a fraction of offspring surviving in each generation. ...
... be supported by the environment leads to a struggle for existence among individuals, with only a fraction of offspring surviving in each generation. ...
naturally selected
... --Organisms with the best adaptations will survive and reproduce passing these good traits down to their offspring ...
... --Organisms with the best adaptations will survive and reproduce passing these good traits down to their offspring ...
Discussion Questions: Introduction to Darwin
... Analyze multiple sources of evidence for evolution. Explain how a great diversity of species increase the chance that at least some organisms will survive major changes in the environment Analyze fossil evidence with regard to biological diversity, episodic speciation, and mass extinction. ...
... Analyze multiple sources of evidence for evolution. Explain how a great diversity of species increase the chance that at least some organisms will survive major changes in the environment Analyze fossil evidence with regard to biological diversity, episodic speciation, and mass extinction. ...
File
... Species have natural differences/variations in traits – ex: fin size These are passed on from one generation to the next Genetic material may change – new variation (mutation) Reproduction: passes these traits to offspring ...
... Species have natural differences/variations in traits – ex: fin size These are passed on from one generation to the next Genetic material may change – new variation (mutation) Reproduction: passes these traits to offspring ...
1 - OpenPsych
... Sexual selection is responsible for sexual dimorphism across species and a variety of traits (Lande, 1980). However, sexual selection raises the average phenotypic trait value not only in the selected sex, but to a lesser extent also in the opposite sex, via the mechanism of genetic correlation betw ...
... Sexual selection is responsible for sexual dimorphism across species and a variety of traits (Lande, 1980). However, sexual selection raises the average phenotypic trait value not only in the selected sex, but to a lesser extent also in the opposite sex, via the mechanism of genetic correlation betw ...
Polygenic trait
... capable of interbreeding, but have differences in courtship rituals or other reproductive behaviors. ...
... capable of interbreeding, but have differences in courtship rituals or other reproductive behaviors. ...
basic features of breeding
... it has become the predominant method of improvement of cultivated strains due to hybrid vigor It is known as combination breeding Distinction is made between intra- and interspecific crossing The successful of hybridization is to great extent dependent on the selection of parental materials ...
... it has become the predominant method of improvement of cultivated strains due to hybrid vigor It is known as combination breeding Distinction is made between intra- and interspecific crossing The successful of hybridization is to great extent dependent on the selection of parental materials ...
HB Unit 11 History of Life and Classification
... Theory of Evolution • Theory of Evolution: change in inherited characteristics over time. -new species develop from pre-existing ones. • Charles Darwin: -studied beak shape in Galapagos finches. -published On the Origin of Species by Means of Natural Selection. ...
... Theory of Evolution • Theory of Evolution: change in inherited characteristics over time. -new species develop from pre-existing ones. • Charles Darwin: -studied beak shape in Galapagos finches. -published On the Origin of Species by Means of Natural Selection. ...
Evolution and Natural Selection
... things buildup and the creature is too different then it’s ancestor to be the same species. ...
... things buildup and the creature is too different then it’s ancestor to be the same species. ...
Evolution Study Guide
... Darwin’s Observations and Ideas of Evolution (section 10.1 & 10.2) 1. Describe how Darwin arrived at his idea about species variation. What accounts for the variation Darwin observed? 2. Recognize variation and adaptations within a species (such as finches or tortoises). Be able to give and/or exp ...
... Darwin’s Observations and Ideas of Evolution (section 10.1 & 10.2) 1. Describe how Darwin arrived at his idea about species variation. What accounts for the variation Darwin observed? 2. Recognize variation and adaptations within a species (such as finches or tortoises). Be able to give and/or exp ...
Natural Selection - Hicksville Public Schools
... • More offspring are produced than can survive. • Overproduction leads to “Struggle for Existence” or Competition. – Compete for limited resources (food, water and shelter). – Only certain individuals are able to survive and reproduce. ...
... • More offspring are produced than can survive. • Overproduction leads to “Struggle for Existence” or Competition. – Compete for limited resources (food, water and shelter). – Only certain individuals are able to survive and reproduce. ...
Sexual selection
![](https://commons.wikimedia.org/wiki/Special:FilePath/Paon_blanc_Madère_2008.jpg?width=300)
Sexual selection is a mode of natural selection where typically members of one gender choose mates of the other gender to mate with, called intersexual selection, and where females normally do the choosing, and competition between members of the same gender to sexually reproduce with members of the opposite sex, called intrasexual selection. These two forms of selection mean that some individuals have better reproductive success than others within a population either from being sexier or preferring sexier partners to produce offspring. For instance in the breeding season sexual selection in frogs occurs with the males first gathering at the water's edge and croaking. The females then arrive and choose the males with the deepest croaks and best territories. Generalizing, males benefit from frequent mating and monopolizing access to a group of fertile females. Females have a limited number of offspring they can have and they maximize the return on the energy they invest in reproduction.First articulated by Charles Darwin who described it as driving speciation and that many organisms had evolved features whose function was deleterious to their individual survival, and then developed by Ronald Fisher in the early 20th century. Sexual selection can lead typically males to extreme efforts to demonstrate their fitness to be chosen by females, producing secondary sexual characteristics, such as ornate bird tails like the peacock plumage, or the antlers of deer, or the manes of lions, caused by a positive feedback mechanism known as a Fisherian runaway, where the passing on of the desire for a trait in one sex is as important as having the trait in the other sex in producing the runaway effect. Although the sexy son hypothesis indicates that females would prefer male sons, Fisher's principle explains why the sex ratio is 1:1 almost without exception. Sexual selection is also found in plants and fungi.The maintenance of sexual reproduction in a highly competitive world has long been one of the major mysteries of biology given that asexual reproduction can reproduce much more quickly as 50% of offspring are not males, unable to produce offspring themselves. However, research published in 2015 indicates that sexual selection can explain the persistence of sexual reproduction.