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Evolution - cccoe.net
Evolution - cccoe.net

... Evolution is defined as the change in species over time. Darwin theorized that evolution occurs through a process known as natural selection. This process is broken down into four parts: ...
Darwins Theory 7.1 Life Science
Darwins Theory 7.1 Life Science

... but what was this process? ...
Evolution by Natural Selection
Evolution by Natural Selection

... 4. evolution= refers to the process by which populations change over time ...
Natural Selection - wlhs.wlwv.k12.or.us
Natural Selection - wlhs.wlwv.k12.or.us

... • Mutations, genetic recombination, crossing over, etc. are “accidents” in the genes of organisms. They do not appear according to any purpose; they just happen. • Mutations cause a large amount of variation among organisms in a population. ...
EVOLUTION NOTES PACKET
EVOLUTION NOTES PACKET

...  Which would be more likely to survive in a muddy pond, a bright red frog or a brown frog? Why? ...
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... Variation comes from two main sources: Mutations and Recombination Mutation: Random change in the DNA of a gene. Can be passed along if in a reproductive cell. Increases variation due to new genes and many individuals in a population. Happens often. Recombination: New allele combinations in an offsp ...
evolution - TeacherWeb
evolution - TeacherWeb

... Natural Selection The finches were one of the main species that he looked at and noticed these differences.  There are 5 parts to his theory of evolution: ...
Mechanisms of Evolution
Mechanisms of Evolution

... Populations, not individuals, evolve • If an organism has a harmful trait, it may be unlikely to survive and reproduce ▫ The organism is programmed by its genes and can NOT change the genes nor the trait ...
Population - Madeira City Schools
Population - Madeira City Schools

... d. random mating must occur (no sexual selection) e. no natural selection occurs 4. The HW equation is used as a baseline--if frequencies deviate from HW values, then the population is evolving a. population still evolves even if at one gene loci 5. Microevolution is caused by violations of the 5 HW ...
File
File

... 13. Dominant alleles are always written as a A. capital letter. B. lower case letter. C. trait. D. Punnett square. ...
Document
Document

... A. Characteristics that are acquired during life are passed to offspring by sexual reproduction. B. Evolution is the result of mutations and recombination, only. C. Organisms best adapted to a changed environment are more likely to reproduce and pass their genes to offspring. D. Asexual reproduction ...
EVOLUTION Enduring Understandings o Mutation is random while
EVOLUTION Enduring Understandings o Mutation is random while

... 2. Identify and explain multiple lines of evidence that support the theory of descent with modification (evolution). Include the following evidences in your discussion: direct observation, homologous structures, analogous structures, vestigial structures, fossil record 3. Identify and explain what i ...
Natural Selection Note
Natural Selection Note

... Natural Selection The survival of an organism depends on its ability to sense and respond to the external environment. In all environments, organisms with similar needs compete for the same resources. These two facts fuel the process of natural selection. Natural selection is a process by which org ...
Part 2: Evolutionary Theories
Part 2: Evolutionary Theories

... peppered moth, light and dark. Before the Industrial Revolution, light moths survived and reproduced more effectively. After the Industrial Revolution, dark moths survived and reproduced more effectively. ...
Chapter 16 —Test A
Chapter 16 —Test A

... _____ 5. Lamarck’s ideas about evolution include the concept that differences among the traits of organisms arise as a result of a. continual increases in population size. b. the actions of organisms as they use or fail to use body structures. c. an unchanging local environment. d. the natural varia ...
LECTURE OUTLINE
LECTURE OUTLINE

... Nonrandom mating occurs when individuals pair up, not by chance, but according to their genotypes or phenotypes. Natural Selection Natural selection is the process by which some individuals produce more offspring than others. Evolution by natural selection requires individual variation, inheritance, ...
SBI 3UI Unit 2 Review: Evolution
SBI 3UI Unit 2 Review: Evolution

... organisms may develop undesirable traits, it is unlikely that they will be passed on to later generations. There are exceptions to this, of course – especially with traits that don’t appear until after reproduction (ex. in humans – Alzheimer’s disease). 11. Describe what mimicry is and why it is con ...
Natural selection
Natural selection

... What causes genetic variation? • The forces that causes population and species to evolve are: 1. Natural selection ...
How Populations Evolve
How Populations Evolve

... Naturalists compared fossil forms with living species and noted patterns of similarities and differences In the early 1800s, French naturalist Jean-Baptiste de Lamarck suggested that the best explanation for these observations is that life changes, that it evolves Lamarck explained evolution as the ...
Darwin & Natural Selection
Darwin & Natural Selection

... 4. Selection  The individuals with the best traits / adaptations will survive and have the opportunity to pass on it’s traits to offspring.  Natural selection acts on the phenotype (physical appearance), not the genotype (genetic makeup)  Ex: When a predator finds its prey, it is due to the prey ...
Mechanisms of Evolution Reading File
Mechanisms of Evolution Reading File

... Natural Selection and Mutations Darwin introduced the theory of evolution by natural selection in 1859. He suggested that all species descended from one common ancestor and claimed that organisms diversified, or evolved, through a process called natural selection. In natural selection, organisms wit ...
History of Life on Earth Vocabulary
History of Life on Earth Vocabulary

... age of the Earth itself. Among the best-known techniques are potassium-argon dating and uranium-lead dating. Radiocarbon dating is used on fossils and other organic matter that is less than 500,000 years old. Fitness – the reproductive success of an organism usually expressed in relation to the aver ...
Evolution PowerPoint
Evolution PowerPoint

... • Explain biological evolution as the consequence of the interaction of population growth, inherited variability of offspring, a finite supply of resources, and/or natural selection by the environment of offspring better able to survive and reproduce ...
Script 3
Script 3

... [16] During the drought conditions, / the large-beaked birds were most fit because they survived to have more offspring. During the wet conditions, / the small-beaked birds were most fit because they survived to have more offspring. [17] According to Darwin, as natural selection… [18] acts on the va ...
Evolution - WordPress.com
Evolution - WordPress.com

... for breeding of useful traits from the natural variation of living organisms. ...
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Inclusive fitness

In evolutionary biology inclusive fitness theory is a model for the evolution of social behaviors (traits), first set forward by W. D. Hamilton in 1963 and 1964. Instead of a trait's frequency increase being thought of only via its average effects on an organism's direct reproduction, Hamilton argued that its average effects on indirect reproduction, via identical copies of the trait in other individuals, also need to be taken into account. Hamilton's theory, alongside reciprocal altruism, is considered one of the two primary mechanisms for the evolution of social behaviors in natural species.From the gene's point of view, evolutionary success ultimately depends on leaving behind the maximum number of copies of itself in the population. Until 1964, it was generally believed that genes only achieved this by causing the individual to leave the maximum number of viable direct offspring. However, in 1964 W. D. Hamilton showed mathematically that, because other members of a population may share identical genes, a gene can also increase its evolutionary success by indirectly promoting the reproduction and survival of such individuals. The most obvious category of such individuals is close genetic relatives, and where these are concerned, the application of inclusive fitness theory is often more straightforwardly treated via the narrower kin selection theory.Belding's ground squirrel provides an example. The ground squirrel gives an alarm call to warn its local group of the presence of a predator. By emitting the alarm, it gives its own location away, putting itself in more danger. In the process, however, the squirrel may protect its relatives within the local group (along with the rest of the group). Therefore, if the effect of the trait influencing the alarm call typically protects the other squirrels in the immediate area, it will lead to the passing on of more of copies of the alarm call trait in the next generation than the squirrel could leave by reproducing on its own. In such a case natural selection will increase the trait that influences giving the alarm call, provided that a sufficient fraction of the shared genes include the gene(s) predisposing to the alarm call.Synalpheus regalis, a eusocial shrimp, also is an example of an organism whose social traits meet the inclusive fitness criterion. The larger defenders protect the young juveniles in the colony from outsiders. By ensuring the young's survival, the genes will continue to be passed on to future generations.Inclusive fitness is more generalized than strict kin selection, which requires that the shared genes are identical by descent. Inclusive fitness is not limited to cases where ""kin"" ('close genetic relatives') are involved.
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