AP Bio Chapter 2

  1. Reductionism
    the approach of reducing complex systems to simpler components that are more manageable to study
  2. Systems biology
    is an approach that attempts to model the dynamic behavior of whole biological systems based on a study of the interactions among the system’s parts
  3. Matter
    is defined as anything that takes up space and has mass.
  4. element-
    a substance that cannot be broken down to other substances by chemical reactions.
  5. Compound-
    is a substance consisting of two of more different elements combined in a fixed ratio.
  6. essential elements-
    of the 92 natural elements about 20-25% that an organism needs to live a healthy life and reproduce.
  7. Which four elements make up 96% of all living matter
    oxygen, carbon, hydrogen, and nitrogen
  8. atom
    is the smallest unit of matter tat still retains the properties of an element
  9. atomic nucleus-
    Protons and neutrons are packed together tightly in a dense core at the center of an atom
  10. isotopes
    all atoms of a given element have the same number of protons, but some atoms have more neutrons than other atoms of the same element and therefore have greater mass
  11. radioactive isotope
    is one in which the nucleus decays spontaneously giving off particles of energy.
  12. Energy-
    is defined as the capacity to cause change
  13. Potential energy-
    is the energy that matter possesses because of its location or structure.
  14. orbital
    the three dimensional space where electron is found 90% of the time
  15. covalent bond
    the sharing of a pair of valence electrons by two atoms.
Card Set
AP Bio Chapter 2
AP Bio Chapter 2