chapter 1

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cassidy
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57932
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chapter 1
Updated:
2011-01-03 19:27:55
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biology
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biology
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  1. biology is the study of
    life
  2. all organisms possess dna, dna
    contains information for growth and development
  3. instructions for traits that are passses from parents to offspring are known as
    genes
  4. homeostasis means
    keeping things the same
  5. what is the study of communities or organisms in relation to their environment?
    ecology
  6. What are charcteristics of living things?
    • reproduction
    • metabolism
    • homeostsis.
  7. the smallest units that can ccarry on all functions of life are called?
    cells
  8. living things need?
    • need energy for life processes
    • are composed of cells
    • have the ability to reproduce?
  9. all organisms are composed of
    cells
  10. all living things maintain a balance within their cells and the environment through the process of
    homeostasis
  11. which of the follwing is a charcteristic of all living things/
    development
  12. a scientist noticed that in acidic pond water some salamanders developed with curved spines this was an?
    observation
  13. scienitific hypotheses are most often tested by the process of?
    experimenting
  14. a hypothesis is?
    a teestable posssible explanation of an observation
  15. a unifying explaintion for a broad range of observations is a
    theory
  16. scientists usually design experiments
    with a good idea of the expeted experimental results
  17. a scientific theory
    may be revised as new evidence is presentned
  18. the word theoryused in a scientific sense means
    a highly tested, generally accepted principle.
  19. which of the following components of a scientific investigation would benefit form communication between scientests?
    measuring observing analyzing data
  20. typically, the order in which the ste ps of the scientific method are apllied is?
    observatins, hypothesis, predictions, controlled testing, verifaction, theory.
  21. a light microscope that has an objective lens of 10* and an ocular lens of 250* has a magnifcation of
    200*
  22. scientisit share their research results by
    publishing in scientific journals and presenting at scientific meetings
  23. ___)is teh study of the i nteraction of organisms wiht their environment and with each other
    ecology
  24. to function properly, all living things must maintain a constant internal environment through the process of___________?
    homeostasis
  25. starting in advance the result that may be obtained from testing a hypothesis is called________?
    prediction
  26. a unifying explanatin for a broad range of observations is a _________?
    theory
  27. a ______ experiment is one in which the conditin suspected to cause the effect is compared to the same situation w ithout the suspected condition?
    controlled
  28. the base unit for length in the System International d'Unites is the______---
    METER
  29. A ____ electron microscompe passes a beam of electrons over a specimen's surface, whereas a _____ electron microscope passes a beam of electrons throught a thin slice of a specimen.
    • sem
    • tem

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