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Vocabulary Chapter 20

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PRESENTATION OUTLINE

CHAPTER 20 VOCAB

BY ANNALISE HERNANDEZ
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HALF-LIFE

  • Definition: The time required for half of the radioactive adams in a sample to decay.
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EXTINCT

  • Definition: Having no living members
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RELATIVE DATING

  • Definition: The science of determining The relative order of past events without necessarily determining their absolute age
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RADIOMETRIC DATING

  • Definition: A method of dating geological specimens by determining The relative proportions of particular radioactive isotopes.

GEOLOGICAL TIME SCALE

  • Definition: A timeline of earths history

ERAS

  • Definition: A long distant period of history with a particular feature or characteristic

PERIOD

  • Definition: a length of portion of time
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PLATE TECTONICS

  • Definition: The interaction of rigid lithospheric plates which move slowly the underlying mantle
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MACROEVOLUTIONARY PATTERNS

  • Definition: major transformation in anatomy, phylogeny, ecology, and behavior, which usually takes place in larger clades.

BACKGROUND EXTINCTION

  • Definition: species become extinct when they fail to adapt to competition and changing environment
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MASS EXTINCTION

  • Definition: When something drastic happens and effects species on a global scale

GRADUALISM

  • Definition: evolution
  • Definition: gradual reformatted and some change
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PUNCTUATED EQUILIBRIUM

  • Definition: when equilibrium is interrupted by small period of geological rapid change

ADAPTIVE RADIATION

  • Definition: Process where a single species evolve into several different species

CONVERGENT EVOLUTION

  • Definition: the appearance of similar characteristics of unrelated organisms

COEVOLUTION

  • Definition: process by which two species evolve in response to changes in each other every time
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ENDOSYMBIOTIC THEORY

  • Definition: Proposes that organelles were formed when different types of cells joined in a kind of merger
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