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Day 5 - Scott County Schools
... Charles Lyell was an English geologist. He wrote a famous book called Principles of Geology. Darwin took the book with him on the Beagle. Lyell argued that geological processes such as erosion change Earth’s surface very gradually. To account for all the changes that had occurred on the planet, Eart ...
... Charles Lyell was an English geologist. He wrote a famous book called Principles of Geology. Darwin took the book with him on the Beagle. Lyell argued that geological processes such as erosion change Earth’s surface very gradually. To account for all the changes that had occurred on the planet, Eart ...
Darwin`s Evolution
... •Darwin thought that a similar process occurs in nature. He called this natural selection. This process can be summed up as follows. – Individuals differ, and some of the differences can be passed on to their offspring. – More offspring are produced than can survive and reproduce. – There is competi ...
... •Darwin thought that a similar process occurs in nature. He called this natural selection. This process can be summed up as follows. – Individuals differ, and some of the differences can be passed on to their offspring. – More offspring are produced than can survive and reproduce. – There is competi ...
CONCEPT MAP
... "design for a higher purpose" (as if natural selection is a god or engineer, with intent for future development) "to pass on their genes" (as if an individual had a conscious desire to perpetuate its genotype, and knew it should do so for future generations) those scientists who reject circular reas ...
... "design for a higher purpose" (as if natural selection is a god or engineer, with intent for future development) "to pass on their genes" (as if an individual had a conscious desire to perpetuate its genotype, and knew it should do so for future generations) those scientists who reject circular reas ...
Evolution of Populations
... Natural selection: differential survival and reproduction among members of a population Natural selection is NOT random – it leads to adaptive evolution – evolution that results in a better match between organisms and their environment. Can affect the distribution of genotypes in any of three ...
... Natural selection: differential survival and reproduction among members of a population Natural selection is NOT random – it leads to adaptive evolution – evolution that results in a better match between organisms and their environment. Can affect the distribution of genotypes in any of three ...
Thamnophis ordinoides
... Conclusions of Endler's book: 1. Selection intensities in nature often are as strong as those implemented by animal breeders. 2. Differences in fitness of > 10% are not uncommon for polymorphic traits. 3. Selection related to survival is generally less strong than selection related to mating ability ...
... Conclusions of Endler's book: 1. Selection intensities in nature often are as strong as those implemented by animal breeders. 2. Differences in fitness of > 10% are not uncommon for polymorphic traits. 3. Selection related to survival is generally less strong than selection related to mating ability ...
Can sexual selection theory inform genetic management of captive
... sional recruitment of wild genotypes). However, there is a direct conflict between the recommendation concerning ideal captive population size for minimizing genetic drift and inbreeding (large Ne) and that for genetic adaptation to captivity (small Ne; Fig. 1a). This conflict between genetic goals ...
... sional recruitment of wild genotypes). However, there is a direct conflict between the recommendation concerning ideal captive population size for minimizing genetic drift and inbreeding (large Ne) and that for genetic adaptation to captivity (small Ne; Fig. 1a). This conflict between genetic goals ...
Divergent selection on, but no genetic conflict over, female and male
... genetic variation (i.e. there must be additive genetic variance) and shows a strong positive intersexual genetic correlation (i.e. a shared genetic architecture), so that the ability of the sexes to evolve independently is constrained, and (iii) that the genetic covariance between the trait and rela ...
... genetic variation (i.e. there must be additive genetic variance) and shows a strong positive intersexual genetic correlation (i.e. a shared genetic architecture), so that the ability of the sexes to evolve independently is constrained, and (iii) that the genetic covariance between the trait and rela ...
Evolution - Fort Bend ISD
... Evolutionary Terms to Know, cont’d Competition – occurs when organisms of the same or ...
... Evolutionary Terms to Know, cont’d Competition – occurs when organisms of the same or ...
PPT
... The old men used to say that the temptation to lust is like a hook. If it is suggested to us and we do not let ourselves be overcome by it, it is easily cut off; but if, once it is presented, we take pleasure in it and let ourselves be overcome, it transforms itself and becomes like iron and is diff ...
... The old men used to say that the temptation to lust is like a hook. If it is suggested to us and we do not let ourselves be overcome by it, it is easily cut off; but if, once it is presented, we take pleasure in it and let ourselves be overcome, it transforms itself and becomes like iron and is diff ...
Sex Chromosomes and Sexual Selection in Poeciliid Fishes
... preferences. If indeed female preferences are preferentially linked to the X chromosome, then many factors would determine the potential for the establishment and maintenance of genetic correlations caused by this linkage. These would include recombination rates between the X and Y and between homol ...
... preferences. If indeed female preferences are preferentially linked to the X chromosome, then many factors would determine the potential for the establishment and maintenance of genetic correlations caused by this linkage. These would include recombination rates between the X and Y and between homol ...
Evolution and Natural Selection
... Neither summary says that variation has to appear “randomly.” Natural selection can work in a situation where new variations tend in some direction, perhaps even toward useful traits. But new variation can be produced in a random, haphazard, or “blind” way, and natural selection will sift the good f ...
... Neither summary says that variation has to appear “randomly.” Natural selection can work in a situation where new variations tend in some direction, perhaps even toward useful traits. But new variation can be produced in a random, haphazard, or “blind” way, and natural selection will sift the good f ...
Therapy for Sexual Impulsivity
... Testosterone, the principal androgen (sex hormone) produced by the testes, is considered the most important androgen affecting male sexual behavior. The role of testosterone as a primary etiological factor in physical and sexual aggression in men, however, remains ambiguous. The majority of studies ...
... Testosterone, the principal androgen (sex hormone) produced by the testes, is considered the most important androgen affecting male sexual behavior. The role of testosterone as a primary etiological factor in physical and sexual aggression in men, however, remains ambiguous. The majority of studies ...
Evolution - Cobb Learning
... the day Charles Darwin published On the Origin of Species by Means of Natural Selection Darwin made two main points in his book: 1. Many current species are descendants of ancestral species 2. Natural selection is the mechanism for this evolutionary process ...
... the day Charles Darwin published On the Origin of Species by Means of Natural Selection Darwin made two main points in his book: 1. Many current species are descendants of ancestral species 2. Natural selection is the mechanism for this evolutionary process ...
Ch. 15 Darwin`s Theory of Evolution
... Darwin thought this applied to plants and other animals even more because humans usually only have one offspring at a time. – So why wasn’t the Earth completely covered in maple trees (for example)? Why were some surviving and others not? ...
... Darwin thought this applied to plants and other animals even more because humans usually only have one offspring at a time. – So why wasn’t the Earth completely covered in maple trees (for example)? Why were some surviving and others not? ...
Benchmarks for Scientific Literacy
... Small differences between parents and offspring can accumulate (through selective breeding) in successive generations so that descendants are very different from their ancestors. ...
... Small differences between parents and offspring can accumulate (through selective breeding) in successive generations so that descendants are very different from their ancestors. ...
the evolutionary dynamics of intralocus sexual conflict
... the behavioral phenotype behind this sexual antagonism, Bedhomme et al. (2008) observed reproductive and feeding traits in the males and females expressing these genomes. Female feeding rate and attractiveness were found to decline with expression of chromosomes subject to male-limited evolution, fi ...
... the behavioral phenotype behind this sexual antagonism, Bedhomme et al. (2008) observed reproductive and feeding traits in the males and females expressing these genomes. Female feeding rate and attractiveness were found to decline with expression of chromosomes subject to male-limited evolution, fi ...
Document
... Decoupling selection and adaptation. (p592) • Adaptation without selection - may reflect phenotypic plasticity to the environment, and hence may not be selected for (since it is variable). • Adaptation and selection occur, but there is no selective basis for differences among adaptations. Related ...
... Decoupling selection and adaptation. (p592) • Adaptation without selection - may reflect phenotypic plasticity to the environment, and hence may not be selected for (since it is variable). • Adaptation and selection occur, but there is no selective basis for differences among adaptations. Related ...
APS Science Curriculum Unit Planner
... evolution and provides additional detail about the sequence in which various lines of descent branched off from one another. 5F/H2 Natural selection provides the following mechanism for evolution: Some variation in heritable characteristics exists within every species; some of these characteristic ...
... evolution and provides additional detail about the sequence in which various lines of descent branched off from one another. 5F/H2 Natural selection provides the following mechanism for evolution: Some variation in heritable characteristics exists within every species; some of these characteristic ...
Reprint
... sexes (e.g. simple morphological traits like tail length) as well as traits such as the probability of mating that are the result of male–female interactions. They might even be potentially complex phenotypic attributes resulting from the interaction of multiple individuals. For example, the probabi ...
... sexes (e.g. simple morphological traits like tail length) as well as traits such as the probability of mating that are the result of male–female interactions. They might even be potentially complex phenotypic attributes resulting from the interaction of multiple individuals. For example, the probabi ...
Section 16–3 The Process of Speciation
... The finches’ beak size and shape has enough inheritable variation to provide raw material for natural selection. Differences in the finches’ beak size and shape produce differences in fitness that cause natural selection to occur. ...
... The finches’ beak size and shape has enough inheritable variation to provide raw material for natural selection. Differences in the finches’ beak size and shape produce differences in fitness that cause natural selection to occur. ...
EVPP 110 Lecture - Populations - Evoluti
... – in the late 1800s, industrial pollution from the Industrial Revolution killed large numbers of lichens, exposing the darker tree bark or rock • the dark variety of the moth became increasing more abundant since it now was camouflaged against the dark surface and the lighter variety was not • by th ...
... – in the late 1800s, industrial pollution from the Industrial Revolution killed large numbers of lichens, exposing the darker tree bark or rock • the dark variety of the moth became increasing more abundant since it now was camouflaged against the dark surface and the lighter variety was not • by th ...
History of Evolutionary Biology Evolutionary Thought before Darwin
... Fact: in every population there is variation (morphological, physiological, behavioral, etc) Fact: much of the variation is heritable (can be passed from parent to offspring) Inference: survival is not necessarily random, but could depend upon the physical attributes of individuals (natural selectio ...
... Fact: in every population there is variation (morphological, physiological, behavioral, etc) Fact: much of the variation is heritable (can be passed from parent to offspring) Inference: survival is not necessarily random, but could depend upon the physical attributes of individuals (natural selectio ...
EVOLUTION QUESTIONS
... C. Traits acquired by individuals can be passed to offspring D. The surface of Earth changes over time. ...
... C. Traits acquired by individuals can be passed to offspring D. The surface of Earth changes over time. ...
Your Right to Quiet Enjoyment of Employment
... Sexual harassment does not need to be directed at a particular individual. In other words, a person can feel offended by virtue of artwork, posters or calendars posted in the work environment, by over-hearing a particular conversation or being part of a group discussion or by receiving a group email ...
... Sexual harassment does not need to be directed at a particular individual. In other words, a person can feel offended by virtue of artwork, posters or calendars posted in the work environment, by over-hearing a particular conversation or being part of a group discussion or by receiving a group email ...
Handout: Sexual Assault, Alcohol, and Drugs
... Ecstasy is commonly sold as small pills or capsules and is also available in powder and liquid forms. It can be slipped into an individual's drink in order to facilitate sexual assault. Ecstasy causes individuals to feel extreme relaxation and positivity towards others while it increases sensitivity ...
... Ecstasy is commonly sold as small pills or capsules and is also available in powder and liquid forms. It can be slipped into an individual's drink in order to facilitate sexual assault. Ecstasy causes individuals to feel extreme relaxation and positivity towards others while it increases sensitivity ...
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.