Sexual Selection IQ
... 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 ...
Ch 15.1-2 m definitions
... Artificial Selection - a type of selective breeding where the parents are chosen to breed because of desired traits. (purebred dogs) Evolution – changes in a species as a result of natural selection. Natural Selection – the idea that the organism with the ...
... Artificial Selection - a type of selective breeding where the parents are chosen to breed because of desired traits. (purebred dogs) Evolution – changes in a species as a result of natural selection. Natural Selection – the idea that the organism with the ...
Sexual Orientation
... • Children who are raised by gay or lesbian parents are as well adjusted as children who are raised by heterosexual parents. They are no more likely to be gay or lesbian in adulthood • Sexual orientation is an early-emerging (as early as age six), ingrained aspect of the self that probably does not ...
... • Children who are raised by gay or lesbian parents are as well adjusted as children who are raised by heterosexual parents. They are no more likely to be gay or lesbian in adulthood • Sexual orientation is an early-emerging (as early as age six), ingrained aspect of the self that probably does not ...
origin of species
... favours the reproductive success of some individuals within a population over others. ...
... favours the reproductive success of some individuals within a population over others. ...
Chapter 13 Theory of Evolution Darwin
... 1. All organisms have variations of traits 2. Some variations allow the organism to be successful in a particular environment and produce more offspring 3. Less successful organisms tend to die out rapidly producing little if any offspring. 4. Competition for survival weeds out inferior specie ...
... 1. All organisms have variations of traits 2. Some variations allow the organism to be successful in a particular environment and produce more offspring 3. Less successful organisms tend to die out rapidly producing little if any offspring. 4. Competition for survival weeds out inferior specie ...
Evolution fib notes
... (2) The _________________________________- Members of a population must compete for _________, __________, and other limited necessities of life; (3) competition. (4) Overproduction: _____________ offspring, must compete, some survive. (5) Survival of the fittest- Those most genetically “______” sur ...
... (2) The _________________________________- Members of a population must compete for _________, __________, and other limited necessities of life; (3) competition. (4) Overproduction: _____________ offspring, must compete, some survive. (5) Survival of the fittest- Those most genetically “______” sur ...
Howler Monkey
... •Many animals learn by operant and classical conditioning. Primates spend much more effort on observational learning…watching another perform a behavior, then remembering what they see and trying it themselves in a safe setting. •This process saves time and energy and also lowers the dangers associa ...
... •Many animals learn by operant and classical conditioning. Primates spend much more effort on observational learning…watching another perform a behavior, then remembering what they see and trying it themselves in a safe setting. •This process saves time and energy and also lowers the dangers associa ...
Chapter 12 Motivation pt. 2: Sexual Motivation, Belongingness, and
... areas causing both sexes’ genitals to enlarge. 2. Plateau: peak of the excitement phase; breathing increases; penal and vaginal secretions increase. 3. Orgasm: ejaculation in the male and vaginal contractions in the female. 4. Resolution phase: body returns to unaroused state. In males, enter ...
... areas causing both sexes’ genitals to enlarge. 2. Plateau: peak of the excitement phase; breathing increases; penal and vaginal secretions increase. 3. Orgasm: ejaculation in the male and vaginal contractions in the female. 4. Resolution phase: body returns to unaroused state. In males, enter ...
Goal 3.05 II EOC Review Questions
... 10. Then prokaryotic aerobic heterotrophs could evolve. What can these cells do that others before them cannot? 11. Name the hypothesis explaining how eukaryotic cells evolved? ___________________________________ ...
... 10. Then prokaryotic aerobic heterotrophs could evolve. What can these cells do that others before them cannot? 11. Name the hypothesis explaining how eukaryotic cells evolved? ___________________________________ ...
Natural Selection Note Guide Textbook: Chapter 1: pages 6 – 8
... Adaptation: Any characteristic of a species that improves its ability to survive and reproduce in a given environment. For example, the long teeth of a naked mole rat are an adaptation that allows them to survive and reproduce successfully in an underground environment. Darwin’s Theory of Evolution ...
... Adaptation: Any characteristic of a species that improves its ability to survive and reproduce in a given environment. For example, the long teeth of a naked mole rat are an adaptation that allows them to survive and reproduce successfully in an underground environment. Darwin’s Theory of Evolution ...
Natural Selection
... lose their leaves and stop growing when it is cold. Some animals grow thick fur coats. Animals like birds migrate to warmer areas to make it easier to find food during the winter season. Plants also have adaptations that help them survive. For example, water lilies have large thin leaves. The struct ...
... lose their leaves and stop growing when it is cold. Some animals grow thick fur coats. Animals like birds migrate to warmer areas to make it easier to find food during the winter season. Plants also have adaptations that help them survive. For example, water lilies have large thin leaves. The struct ...
2-16-16 Types of Selection Work
... 11. Coho salmon are either very large or very small due to the fact that these respective sizes both pose reproductive benefits. There are very few “normal” sized coho salmon. ______________ _______________________________ ...
... 11. Coho salmon are either very large or very small due to the fact that these respective sizes both pose reproductive benefits. There are very few “normal” sized coho salmon. ______________ _______________________________ ...
Darwin and Evolution - Ms. Oldendorf`s AP Biology
... But he was only prompted to do so after he got a letter from another naturalist asking for his thoughts on his theory … the SAME theory… So UH-OH!! Better hurry up and publish!! Sorry Sir Alfred Wallace… ...
... But he was only prompted to do so after he got a letter from another naturalist asking for his thoughts on his theory … the SAME theory… So UH-OH!! Better hurry up and publish!! Sorry Sir Alfred Wallace… ...
Biology 11 Name: Evolution/Natural Selection Practice Test General
... Which of the following is an example of natural selection? a. As the earth's climate became colder, woolly mammoths adapted by growing thicker coats of fur b. When the food supply grew scarce, giraffes developed longer necks to reach the higher leaves on trees c. Even though a scientists cut off the ...
... Which of the following is an example of natural selection? a. As the earth's climate became colder, woolly mammoths adapted by growing thicker coats of fur b. When the food supply grew scarce, giraffes developed longer necks to reach the higher leaves on trees c. Even though a scientists cut off the ...
Evolution
... The foundations of the modern synthesis, based on Darwin’s model, were laid by several key biologists: Ronald Fisher Sewall Wright J.B.S. Haldane ...
... The foundations of the modern synthesis, based on Darwin’s model, were laid by several key biologists: Ronald Fisher Sewall Wright J.B.S. Haldane ...
Species
... F There is little evidence that supports the theory of evolution. T Geographic isolation is one of the main ways that new species form. T Continental drift affected the evolution of species. ...
... F There is little evidence that supports the theory of evolution. T Geographic isolation is one of the main ways that new species form. T Continental drift affected the evolution of species. ...
Evolution
... other resources are limited, so offspring must compete with each other to survive. ...
... other resources are limited, so offspring must compete with each other to survive. ...
Intro to Natural Selection Sept 2008
... when non-native species are introduced. • Over-feeding can cause a disaster for the entire ecosystem. ...
... when non-native species are introduced. • Over-feeding can cause a disaster for the entire ecosystem. ...
Theory of Evolution
... These traits could then be passed on to their offspring. Over time, process led to change in species ...
... These traits could then be passed on to their offspring. Over time, process led to change in species ...
some theoretical perspectives on human sexuality
... Double Standard “Sperm are cheap, eggs are expensive.” ...
... Double Standard “Sperm are cheap, eggs are expensive.” ...
Evolution: How Change Occurs
... Modern Evolutionary Theory • Today we define evolutionary fitness as the success an organism has in passing on its genes to the next generation • An adaptation is any genetically controlled trait that increases an organism’s fitness • Think about the weight lifter- big muscles won’t be inherited bu ...
... Modern Evolutionary Theory • Today we define evolutionary fitness as the success an organism has in passing on its genes to the next generation • An adaptation is any genetically controlled trait that increases an organism’s fitness • Think about the weight lifter- big muscles won’t be inherited bu ...
Sources of heritable variation
... a population from generation to generation over time’. • Although individuals are selected for, it is populations that evolve. • For natural selection to work there has to be variation in the population for selection to act on. ...
... a population from generation to generation over time’. • Although individuals are selected for, it is populations that evolve. • For natural selection to work there has to be variation in the population for selection to act on. ...
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.