BIO UNIT 1 Section 1

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drummerboy424
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234407
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BIO UNIT 1 Section 1
Updated:
2013-09-12 01:10:38
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BIO UNIT
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BIO UNIT 1
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  1. The 5 Characteristics of Life are
    • energy
    • cells
    • information
    • reproduce
    • evolve
  2. Are viruses considered to be living?
    • Not
    • outside of their host
  3. Study of modern Biology developed around  two great theories:
    1.The cell theory

    • 2.The theory of evolution by
    • natural selection
  4. 2 important aspects to a scientific theory:
    • 1:If you add any new evidence, it supports the
    • theory.

    • 2:It allows you to make predictions based on the
    • theory.
  5. Most theories have two components, which are:
    Pattern & Process
  6. The 2 main cell types are:
    Pro karyotic

    Eu karyotic
  7. Prokaryotic cells
    Don't have a nucleus, Smaller and lack organelles
  8. Eukaryotic cells
    have a Nucleus, Have memberain organels and are larger
  9. Atoms bond together to make
    molecules
  10. Nucleus consist of:
    Protons (+) and neutrons (0)
  11. What is orbiting the nucleus?
    Electrons (-)
  12. Atomic Number is?
    Number of protons in an atom.
  13. Mass Number is?
    Protons + Neutrons
  14. The Elements of Life are:
    Carbon (C), Hydrogen (H), Nitrogen (N), Oxygen (O), Phosphorous (P), & Sulfer (S): CHNOPS.
  15. Electrons move around the nucleus in
    pairs that can hold 2 electrons
  16. Orbitals are grouped into
    electron Shells.
  17. Valence electrons are:
    Reactive elements have outer electron shells whose orbitals are not filled
  18. Reactive atoms become stable by
    making
    • chemical Bonds with
    • other reactive atoms.
  19. Unpaired electrons are one between
    elements, This is what kind of bond?
    Covalent
  20. One atom loses an unpaired electron and another element gains an electron to fill orbital is what kind of bond?
    Ionic
  21. Two atoms share electrons EQUALLY
    No partial charge on either atom are what kind of covalent bonds?
    Nonpolar
  22. One atom more electro negative and pulls electron closer to its nucleus
    Unequal
    sharing leads to partial (δ) +/-charges
    is what kind of covalent bond?
    Polar
  23. Why are some molecules more
    electronegative?
    • Combination of Protons &
    • distance from nucleus to valence shell
  24. What is the most Important bond in living systems?
    Hydrogen Bonds.

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