BIO 100 - Chapter 22 Evolution & Origin of Life

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  1. The process of evolution ultimately depends on changes that occur in the ________ of organisms.
  2. The mineralized remains of organisms left in soil such as bones are called ________.
  3. When considering evolution, structures of present-day organissms that have the same function but did not develop from the same ancestral structure are said to be ________.
  4. In an evolutionary context, ________ structures do not currently have a function in present-day organisms.
  5. The early embryos of vertebrates follow the same pathway of development; one structure that all vertebrate embryos have in common is the ________, which serves as a primitive support structure.
  6. The process by which the continental plates move slowly over time is _______.
    continental drift
  7. ________ refers to random changes in allel frequency as a result of chance events.
    Genetic drift
  8. Gene mutation leads to new allele or variation in a population, ________ is the filter that will select for or against organisms that carry the "new" allele.
    natural selection
  9. A map that illustrates relationships among species as well as evolutionary change is a(n) ________.
    evolutionary (phylogenetic) tree
  10. The early atmosphere of Earth did not contain the gas ________; it is believed that life as we know it would not have evolved if this gas had been present.
  11. The first self-replicating molecule to form on Earth was ________.
  12. The process by which organisms use the energy from sunlight to produce complex carbon-containing molecules from carbon dioxide and water is ________.
  13. The process of producing energy from organic substrates in the absence of oxygen is called ________.
    anaerobic metabolism
  14. Humans are classified in the class ________ and the order ________.
    Mammalia, Primata (primates)
  15. Humans are classified as ________ because of our larger bodies, bigger brains, and lack of tails in relation to other primates.
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BIO 100 - Chapter 22 Evolution & Origin of Life
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