Divergent evolution
... •ACQUIRED TRAITS were passed to offspring. •Acquired traits- determined by behavior NOT genetics. •Duck’s webbed feet come from “stretching” their toes. •Human’s lost tail because they “don’t use it”. •Girraffe’s long neck ‘cause they “stretched” to reach leaves. •WRONG & EASILY DISPROVED ...
... •ACQUIRED TRAITS were passed to offspring. •Acquired traits- determined by behavior NOT genetics. •Duck’s webbed feet come from “stretching” their toes. •Human’s lost tail because they “don’t use it”. •Girraffe’s long neck ‘cause they “stretched” to reach leaves. •WRONG & EASILY DISPROVED ...
Vegetables in the Cabbage Family
... Look up a breed of dog and discuss why it was bred with certain traits and not others. (due Thursday). ...
... Look up a breed of dog and discuss why it was bred with certain traits and not others. (due Thursday). ...
Unit 6
... Natural selection – differential success in reproduction. It accumulates and maintains favorable genotypes in a population so it can survive. These genotypes however, can result only within what genetic viability already exists in the population. 6. Distinguish between the bottleneck effect and the ...
... Natural selection – differential success in reproduction. It accumulates and maintains favorable genotypes in a population so it can survive. These genotypes however, can result only within what genetic viability already exists in the population. 6. Distinguish between the bottleneck effect and the ...
File
... THIRTEENTH RIB: Our closest cousins, chimpanzees and gorillas, have an extra set of ribs. Most of us have 12, but 8 percent of adults have the ...
... THIRTEENTH RIB: Our closest cousins, chimpanzees and gorillas, have an extra set of ribs. Most of us have 12, but 8 percent of adults have the ...
Evolution - Doral Academy Preparatory
... • Descent with Modification – Darwin wrote On the Origin of Species, in which he argued that descent with modification occurs, that all species descended from common ancestors, and that natural selection is the mechanism for evolution. ...
... • Descent with Modification – Darwin wrote On the Origin of Species, in which he argued that descent with modification occurs, that all species descended from common ancestors, and that natural selection is the mechanism for evolution. ...
Chapter 22 Concepts Key
... had in their unique environments. These observations made him think more abou thow species might develop after they had been separated from the mainland and were able to speciate each island in possibly different ways. 3.) Explain how adaptations and natural selection work together as the driving fo ...
... had in their unique environments. These observations made him think more abou thow species might develop after they had been separated from the mainland and were able to speciate each island in possibly different ways. 3.) Explain how adaptations and natural selection work together as the driving fo ...
Just What Were You Thinking
... 3. What term describes all the individuals of the same species that live in the same area? (A) environmental group (B) population (C) community (D) competitive group 4. Which term is a measure of the ability to survive and produce the most offspring? (A) overproduction (B) variation (C) adaptation ( ...
... 3. What term describes all the individuals of the same species that live in the same area? (A) environmental group (B) population (C) community (D) competitive group 4. Which term is a measure of the ability to survive and produce the most offspring? (A) overproduction (B) variation (C) adaptation ( ...
Some Evidence of Evolution
... species evolve from existing species • Speciation is represented as a “fork in a branch ...
... species evolve from existing species • Speciation is represented as a “fork in a branch ...
Big Idea 1 - Amundsen High School
... Essential Knowledge 1.A.1 According to Darwin’s theory of natural selection, competition for limited resources results in differential survival. Individuals with more favorable phenotypes are more likely to survive and produce more offspring, thus passing traits to subsequent generations. ...
... Essential Knowledge 1.A.1 According to Darwin’s theory of natural selection, competition for limited resources results in differential survival. Individuals with more favorable phenotypes are more likely to survive and produce more offspring, thus passing traits to subsequent generations. ...
natural selection - Science with Mr. Enns
... Many differences, or variations, exist among individuals of any species. Some variations may make an organism better suited to its environment. An individual that is best suited to its environment will then be more likely survive and to reproduce, thus passing on its traits to its offspring. ...
... Many differences, or variations, exist among individuals of any species. Some variations may make an organism better suited to its environment. An individual that is best suited to its environment will then be more likely survive and to reproduce, thus passing on its traits to its offspring. ...
Evolution notes PDP - Lincoln Park High School
... o Conflicted w/ hypothesis of Jean-Baptiste Lamarck that said use & disuse leads to acquired characteristics that can be inherited by offspring o Observations: there is variation in nature, much of which is heritable (genetic) the size of a pop. tends to remain stable Resources become limited ...
... o Conflicted w/ hypothesis of Jean-Baptiste Lamarck that said use & disuse leads to acquired characteristics that can be inherited by offspring o Observations: there is variation in nature, much of which is heritable (genetic) the size of a pop. tends to remain stable Resources become limited ...
natural selection
... selection leads to more complex and better adapted organisms. c) Worms possessing genetic variations that help them to survive and thrive in the new environment will leave more offspring than others lacking those traits. Over time, the proportion of the worm population with these adaptive traits wil ...
... selection leads to more complex and better adapted organisms. c) Worms possessing genetic variations that help them to survive and thrive in the new environment will leave more offspring than others lacking those traits. Over time, the proportion of the worm population with these adaptive traits wil ...
3.4-Evolutionary Mechanisms
... 2)The gene pool of a large population of fruit flies contains only two eye-colour alleles; the dominant red eyes (W) and the recessive white alleles (w). Only 1% of the population has white eyes. Determine the allele and genotype frequencies of this population. ...
... 2)The gene pool of a large population of fruit flies contains only two eye-colour alleles; the dominant red eyes (W) and the recessive white alleles (w). Only 1% of the population has white eyes. Determine the allele and genotype frequencies of this population. ...
Bio Crash Course
... – Travelled on the HMS Beagle 1831-1836, to the Galapagos Island and observed species that lead to his theory of evolution – On the Origin of Species was a joint publication with Alfred Russel Wallace ...
... – Travelled on the HMS Beagle 1831-1836, to the Galapagos Island and observed species that lead to his theory of evolution – On the Origin of Species was a joint publication with Alfred Russel Wallace ...
Evolution PPT
... ◦ Reasoned that if the human population grew continuously, there would not be enough resources for everyone ◦ His reasoning explained why plants and animals produced more a high amount of offspring since a portion will not survive due to environmental factors ◦ Ex: Maple tree produces thousands of s ...
... ◦ Reasoned that if the human population grew continuously, there would not be enough resources for everyone ◦ His reasoning explained why plants and animals produced more a high amount of offspring since a portion will not survive due to environmental factors ◦ Ex: Maple tree produces thousands of s ...
Changes Over Time
... • Individual organisms differ, and some of this variation is heritable • Organisms produce more offspring than can survive, which leads to competition for limited resources • Organisms best suited to their environment survive and reproduce most successfully (and pass their traits on) causing a speci ...
... • Individual organisms differ, and some of this variation is heritable • Organisms produce more offspring than can survive, which leads to competition for limited resources • Organisms best suited to their environment survive and reproduce most successfully (and pass their traits on) causing a speci ...
Darwin, Mendel, and The Rise of the Synthetic
... into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.” ...
... into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.” ...
22.0Evidence Evolution
... “There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wond ...
... “There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wond ...
Populations
... selection on polygenic traits favors both extremes of a bell curve? A. stabilizing selection B. disruptive selection C. directional selection D. genetic drift ...
... selection on polygenic traits favors both extremes of a bell curve? A. stabilizing selection B. disruptive selection C. directional selection D. genetic drift ...
As people live longer and reproduce less, natural
... women to taller and thinner ones. It's partly because selection began acting less on mortality and more on fertility over time. But other In many places around the world, people are living environmental changes were shown to play an longer and are having fewer children. But that's not important role ...
... women to taller and thinner ones. It's partly because selection began acting less on mortality and more on fertility over time. But other In many places around the world, people are living environmental changes were shown to play an longer and are having fewer children. But that's not important role ...
PPT
... Microevolution is a Change within a Population’s Gene Pool •Gene Pool – all of the alleles (forms of genes) in all the individuals of a population. – Where genetic variation (the raw material of evolution) is stored. ...
... Microevolution is a Change within a Population’s Gene Pool •Gene Pool – all of the alleles (forms of genes) in all the individuals of a population. – Where genetic variation (the raw material of evolution) is stored. ...
Darwin, Mendel, and the Rise of the Synthetic Theory
... • A cyclical “world machine” that exhibited “no vestige of a beginning – no prospect of an end.” • This view ultimately led to modern geological time scales ...
... • A cyclical “world machine” that exhibited “no vestige of a beginning – no prospect of an end.” • This view ultimately led to modern geological time scales ...
Hardy-Weinberg Principle
... Allele and Genotype Frequencies Each diploid individual in the population has 2 copies of each gene. The allele frequency is the proportion of all the genes in the population that are a particular allele. The genotype frequency of the proportion of a population that is a particular genotype. ...
... Allele and Genotype Frequencies Each diploid individual in the population has 2 copies of each gene. The allele frequency is the proportion of all the genes in the population that are a particular allele. The genotype frequency of the proportion of a population that is a particular genotype. ...
Natural selection
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype; it is a key mechanism of evolution. The term ""natural selection"" was popularised by Charles Darwin, who intended it to be compared with artificial selection, now more commonly referred to as selective breeding.Variation exists within all populations of organisms. This occurs partly because random mutations arise in the genome of an individual organism, and these mutations can be passed to offspring. Throughout the individuals’ lives, their genomes interact with their environments to cause variations in traits. (The environment of a genome includes the molecular biology in the cell, other cells, other individuals, populations, species, as well as the abiotic environment.) Individuals with certain variants of the trait may survive and reproduce more than individuals with other, less successful, variants. Therefore, the population evolves. Factors that affect reproductive success are also important, an issue that Darwin developed in his ideas on sexual selection, which was redefined as being included in natural selection in the 1930s when biologists considered it not to be very important, and fecundity selection, for example.Natural selection acts on the phenotype, or the observable characteristics of an organism, but the genetic (heritable) basis of any phenotype that gives a reproductive advantage may become more common in a population (see allele frequency). Over time, this process can result in populations that specialise for particular ecological niches (microevolution) and may eventually result in the emergence of new species (macroevolution). In other words, natural selection is an important process (though not the only process) by which evolution takes place within a population of organisms. Natural selection can be contrasted with artificial selection, in which humans intentionally choose specific traits (although they may not always get what they want). In natural selection there is no intentional choice. In other words, artificial selection is teleological and natural selection is not teleological.Natural selection is one of the cornerstones of modern biology. The concept was published by Darwin and Alfred Russel Wallace in a joint presentation of papers in 1858, and set out in Darwin's influential 1859 book On the Origin of Species, in which natural selection was described as analogous to artificial selection, a process by which animals and plants with traits considered desirable by human breeders are systematically favoured for reproduction. The concept of natural selection was originally developed in the absence of a valid theory of heredity; at the time of Darwin's writing, nothing was known of modern genetics. The union of traditional Darwinian evolution with subsequent discoveries in classical and molecular genetics is termed the modern evolutionary synthesis. Natural selection remains the primary explanation for adaptive evolution.