Science: 6.4

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Author:
littleg.ward
ID:
253625
Filename:
Science: 6.4
Updated:
2013-12-17 15:42:10
Tags:
science
Folders:
First,Semester
Description:
First semester ch 6 science
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  1. _______ found in sedimentary rock show evidence that living things evolved.
    FOSSILS
  2. Fossil age can be determined by _____ basic methods.
    TWO
  3. ________ dating looks at fossil location in a particular layer of rock; older rock layers are under newer rock layers.
    RELATIVE
  4. ________ dating compares the amount of radioactive element with the amount of nonradioactive element in a rock.
    RADIOMETRIC
  5. Fossil records have gaps.

    Incomplete rock record; most organisms do not become ________.
    FOSSILS
  6. Fossil records have gaps.

    Enough fossils have been discovered for scientists to conclude that complex organisms appeared ________ simpler ones.
    AFTER
  7. Fossil records have gaps.

    Most organisms that ever existed are now _________.
    EXTINCT
  8. ________ evidence, such as the development of antibiotic resistance in bacteria, supports evolution.
    DIRECT
  9. Indirect evidence supporting evolution:

    ________, the study of embryos and their development, shows similarities among all vertebrate species.
    EMBRYOLOGY
  10. Indirect evidence supporting evolution:

    ________ body parts can indicate two or more species share common ancestors.
    HOMOLOGOUS
  11. Indirect evidence supporting evolution:

    _________structures that don't seem to have a function, but might have once functioned in an ancestor.
    VESTIGIAL
  12. Indirect evidence supporting evolution:

    ________ can provide evidence about how closely related organisms are.
    DNA
  13. groups of mammals with opposable thumbs, binocular vision, and flexible shoulders
    PRIMATES
  14. ________ appeared about 4 to 6 million years ago and had larger brains than apes.
    HOMONIDS
  15. Fossils, such as Australopithecus, point to _______ as the origin of hominids.
    AFRICA
  16. Homo habilis and Homo erectus are thought to be early human ________.
    ANCESTORS

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