Joan Roughgarden, `Challenging Darwin`s Theory of Sexual
... struggle between the males for the possession of the females”, or female birds “selecting… males, according to their standard of beauty”. However, by 1871 Darwin could assert confidently in The Descent of Man that sexual selection “depends on the advantage which certain individuals have over others ...
... struggle between the males for the possession of the females”, or female birds “selecting… males, according to their standard of beauty”. However, by 1871 Darwin could assert confidently in The Descent of Man that sexual selection “depends on the advantage which certain individuals have over others ...
1 Chapters 16-17 Notes: Evolution Words to Know: evolution, fitness
... (1785) James Hutton: Using geological examples, concluded that the earth must be much __________________than a few thousand years. ...
... (1785) James Hutton: Using geological examples, concluded that the earth must be much __________________than a few thousand years. ...
Evolution of Populations
... No immigration or emigration No mutation No natural selection ...
... No immigration or emigration No mutation No natural selection ...
Evolution by Natural Selection
... ○ Over many generations, the finches separated into different species of finch. Each species adapted to the particular environment of the island. ...
... ○ Over many generations, the finches separated into different species of finch. Each species adapted to the particular environment of the island. ...
Evolution
... shows us some of the changes that have occurred over time. • This fossil of Archaeopteryx is a link between reptiles and birds. • What are its reptilian characteristics? What are its bird-like or avian characteristics? ...
... shows us some of the changes that have occurred over time. • This fossil of Archaeopteryx is a link between reptiles and birds. • What are its reptilian characteristics? What are its bird-like or avian characteristics? ...
EVOLUTION Practice TestHISTORY
... For each type of evidence for evolution listed below, describe what it is, and how it shows change over time in a species. ...
... For each type of evidence for evolution listed below, describe what it is, and how it shows change over time in a species. ...
Evolution Notes
... Founder Effect: a cause of genetic drift attributable to colonization by a limited number of individuals from a parent population (example – if you pull 10 colored balls from a trash can, and you only pull out red ones, even through other colors are there, you end up with a new population with only ...
... Founder Effect: a cause of genetic drift attributable to colonization by a limited number of individuals from a parent population (example – if you pull 10 colored balls from a trash can, and you only pull out red ones, even through other colors are there, you end up with a new population with only ...
Evolution Notes Pages
... Founder Effect: a cause of genetic drift attributable to colonization by a limited number of individuals from a parent population (example – if you pull 10 colored balls from a trash can, and you only pull out red ones, even through other colors are there, you end up with a new population with only ...
... Founder Effect: a cause of genetic drift attributable to colonization by a limited number of individuals from a parent population (example – if you pull 10 colored balls from a trash can, and you only pull out red ones, even through other colors are there, you end up with a new population with only ...
Ch01
... supports this), though fossils from a specific common ancestor (6 mya)have not been found. ...
... supports this), though fossils from a specific common ancestor (6 mya)have not been found. ...
Evolution
... Notes Natural Selection Natural Selection Examples: peppered moth, multi-drug resistant TB ...
... Notes Natural Selection Natural Selection Examples: peppered moth, multi-drug resistant TB ...
Evolution by Natural Selection
... • In biology, an adaptation is ANY inherited characteristic that increases an organism’s chance for survival. The possibilities are limitless! Just look at an organism and see how it works well in its ...
... • In biology, an adaptation is ANY inherited characteristic that increases an organism’s chance for survival. The possibilities are limitless! Just look at an organism and see how it works well in its ...
Chapter 15 Review Worksheet - TJ
... reproduction, to 100 000 micro-organisms in 7 days. A pair of these descendants also give rise to 100 000 micro-organisms in 7 days if placed in a fresh solution. Observation 2: The individuals in the population differ slightly in size, colour, and shape. Observation 3: After several weeks in one so ...
... reproduction, to 100 000 micro-organisms in 7 days. A pair of these descendants also give rise to 100 000 micro-organisms in 7 days if placed in a fresh solution. Observation 2: The individuals in the population differ slightly in size, colour, and shape. Observation 3: After several weeks in one so ...
Chapter 8 PP
... A characteristic of a healthy family It is psychological as well as physiological ...
... A characteristic of a healthy family It is psychological as well as physiological ...
Ch. 15, Darwin`s Theory of Evolution
... • Darwin’s greatest contribution was his concept of natural selection • In the struggle for survival, the most fit- the fastest prey, the strongest predator , the one with the sharpest claws, wins the game of survival. Survival of the fittest. ...
... • Darwin’s greatest contribution was his concept of natural selection • In the struggle for survival, the most fit- the fastest prey, the strongest predator , the one with the sharpest claws, wins the game of survival. Survival of the fittest. ...
Speciation
... – Apple finding males mate with apple finding females – Hawthorn finding males mate with hawthorn finding females – About 94% of fly matings are with same type • But that leaves about 6% of matings apple-hawthorn • That’s still a lot of gene flow ...
... – Apple finding males mate with apple finding females – Hawthorn finding males mate with hawthorn finding females – About 94% of fly matings are with same type • But that leaves about 6% of matings apple-hawthorn • That’s still a lot of gene flow ...
Evolutionary Theory
... The discovery of the new world challenged fundamental views about the planet. Exposure to new plants and animals increased the awareness of biological diversity. Copernicus challenged the idea that the earth was the center of the universe. Galileo’s work further supported the idea that the universe ...
... The discovery of the new world challenged fundamental views about the planet. Exposure to new plants and animals increased the awareness of biological diversity. Copernicus challenged the idea that the earth was the center of the universe. Galileo’s work further supported the idea that the universe ...
Chapter 2 the Development of Evolutionary Theory
... In each generation, more individuals are produced than can survive. Individuals that possess favorable traits or variations are more likely to survive and produce offspring than those who do not. ...
... In each generation, more individuals are produced than can survive. Individuals that possess favorable traits or variations are more likely to survive and produce offspring than those who do not. ...
Evolution by Natural Selection
... • He noticed differences in related species that correlated geography. ...
... • He noticed differences in related species that correlated geography. ...
Evolution and Natrual Selection
... • Selection by humans for breeding of useful traits from the natural variation among different organisms, Ex. Dog Breeding ...
... • Selection by humans for breeding of useful traits from the natural variation among different organisms, Ex. Dog Breeding ...
Power Point Presentation
... Geologic change is the steady accumulation of changes over a long period of time ...
... Geologic change is the steady accumulation of changes over a long period of time ...
Sexual selection
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.