Phasmatodea or walking sticks live in the forested areas. They use camouflage to blend in with their environment to avoid predators. They have the uncanny ability to appear like part of the plants
Natural Selection & Evolution Essay The theory of Evolution by Natural Selection explains the diversity of Living Things and is supported by a range of scientific evidence – discuss The theory of evolution by natural selection is the process where an environmental factor acts on a population and results in some organisms having more offspring than others. This theory was proposed by Charles Darwin, an English biologist in 1858. He meant by this that the selection was done by nature, not humans and…
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The study of comparative anatomy predates the modern study of evolution. Early evolutionary scientists like Buffon and Lamarck used comparative anatomy to determine relationships between species. Organisms with similar structures, they argued, must have acquired these traits from a common ancestor. Today, comparative anatomy can serve as the first line of reasoning in determining the relatedness of species. However, there are many hidden dangers that make it necessary to support evidence from comparative…
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these genes come from in the first place? How are new genes made? In an April 28, 2014 article for the New York Times, “The Continuing Evolution of Genes,” science writer and lecturer Carl Zimmer reported on just these questions. According to Zimmer, for years the prevalent theory on the origin of new genes related to gene families, which develop through the evolution of DNA duplicated by cells. New genes develop through evolutionary changes in…
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Species: a group of viably interbreeding organisms Lineage: a species through time Speciation: when lineages split One lineage splits into two and so on Evolution: Change of species over time NOT Darwin’s idea Lamarck’s ideas on evolution were already well known in Darwin’s day Darwin’s most important ideas: Common Descent with Modification Natural Selection Common Descent with Modification: All living organisms are related, descending from a single common ancestor. Diversity is the result of…
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collected a powerful foundation of evidence to support the theory of evolution by comparing 1) fossil records, 2) structural similarities among organisms, 3) the geographical distribution of organisms, 4) embryological similarities among organisms, 5) patterns among organisms, 6) the molecular similarities among organisms, and 7) the direct evidence of evolutionary changes in laboratories and the wild. These seven “pillars” of evolution explain the unity and diversity of life; how ancient organisms have…
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over time known as evolution. 2.) The layers of rock deposits conserved by other layers of deposits called strata. 3.) The process by which individuals that are better adapted to their environment, to survive, and to reproduce; known as natural selection. 4.) A measure of an individual's hereditary contribution to the next generation is called fitness. Section Review 1.) Explain Darwin's use of the phase “descent with modification” to describe the process of evolution. As the process…
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inheritance of acquired traits as proposed by Lamarck? Step 3 shows the inheritance of acquired traits by the young. 3. How did Lamarck propose that species change over time? Lamarck was one of the first to develop scientific hypotheses about evolution and to realize that organisms change over time. 4. How would Lamarck have explained the length of a giraffe’s neck? A giraffe could have acquired a long neck because it began to stretch its neck upward to reach higher and higher on trees…
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____ 1. Robert Hooke observed cork cells under a microscope. ____ 2. Anton van Leeuwenhoek invented 1st compound microscope. ____ 3. Resolution is a microscope’s way of enhancing the object. ____ 4. Magnification and resolution. ____ 5. Using a 10 ocular lens with a 10 objective lens (you should be able to do this) ____ 6. A scientist who performs an experiment has a good idea what the outcome of the experiment is going to be. ____ 7. A series of flexible steps. ____ 8. The…
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Chapter 13 Meiosis and Sexual Life Cycles Lecture Outline Overview: Hereditary Similarity and Variation Living organisms are distinguished by their ability to reproduce their own kind. Offspring resemble their parents more than they do less closely related individuals of the same species. The transmission of traits from one generation to the next is called heredity or inheritance. However, offspring differ somewhat from parents and siblings, demonstrating variation. Farmers have bred plants…
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organisms consisting of a single common ancestor and all descendants of that ancestor. Cladistics A method of classification of living organisms using cladograms. Convergent evolution Evolution where species may resemble each other if they occupy similar ecological roles and go through natural selection. Divergent evolution The evolution that involves diversification of an ancestral group into number of different species in various habitats. Endosymbiotic theory This theory explains the origin of chloroplasts…
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