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The origin of species / Charles Darwin ; abridged and introduced by Philip Appleman.

By: Contributor(s): Material type: TextTextPublisher: New York : Norton, [1975]Edition: first editionDescription: 128 pages : illustrations ; 22 cmContent type:
  • text
Media type:
  • unmediated
Carrier type:
  • volume
ISBN:
  • 0393092194
Uniform titles:
  • On the origin of species
Subject(s): DDC classification:
  • 575.0162 21 D.C.O.
Summary: Darwin’s theory is based on the notion of variation. It argues that the numerous traits and adaptations that differentiate species from each other also explain how species evolved over time and gradually diverged. Variations in organisms are apparent both within domesticated species and within species throughout the natural world. Variations in colors, structures, organs, and physical traits differentiate a multitude of species from one another. Heredity is the mechanism that perpetuates variations, Darwin argues, as traits are passed from parents to offspring. What is important about these variations to Darwin, though, is the way they allow species to adapt and survive in the natural world. He gives numerous examples of variations that illustrate the wondrous adaptations that allow species to survive in their natural environments: the beak that allows the woodpecker to gather insects, the wings that allow the bat to fly, the paddles that allow the porpoise to swim, and so on. Darwin hypothesizes that the minor variations we see within a single species—such as variations in size, shape, and color of organisms—are related to the more distinct variations seen across different species. His theory of evolution explains how variations cause the origin of species.
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Holdings
Item type Current library Collection Call number Status Date due Barcode
Books Books Main library A9 Pharmacy ( Pharmacognosy ) 575.0162 D.C.O. (Browse shelf(Opens below)) Available 00002015

Includes index.

Bibliography: p. 125-126.

Darwin’s theory is based on the notion of variation. It argues that the numerous traits and adaptations that differentiate species from each other also explain how species evolved over time and gradually diverged. Variations in organisms are apparent both within domesticated species and within species throughout the natural world. Variations in colors, structures, organs, and physical traits differentiate a multitude of species from one another. Heredity is the mechanism that perpetuates variations, Darwin argues, as traits are passed from parents to offspring. What is important about these variations to Darwin, though, is the way they allow species to adapt and survive in the natural world. He gives numerous examples of variations that illustrate the wondrous adaptations that allow species to survive in their natural environments: the beak that allows the woodpecker to gather insects, the wings that allow the bat to fly, the paddles that allow the porpoise to swim, and so on. Darwin hypothesizes that the minor variations we see within a single species—such as variations in size, shape, and color of organisms—are related to the more distinct variations seen across different species. His theory of evolution explains how variations cause the origin of species.

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