Introduction to Living Things

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Across
  1. 2. formed when two or more atoms bond.
  2. 4. each group of tissues that work together to perform a specific job.
  3. 5. an action that occurs as a result of a stimulus.
  4. 8. an organism whose cell(s) lacks a nucleus Ex: bacteria.
  5. 9. giant molecules ex: organic compounds.
  6. 12. a change in an organism's surronding that causes it to react.
  7. 13. covers and protects the cells beneath it.
  8. 15. cells spaced far apart; defends body from invaders, acts as a storehouse, gives support.
Down
  1. 1. contains cells that generate electric impulses and transfer the impulses to other cells.
  2. 2. contains cells that move the parts of your body.
  3. 3. an organism whose cell(s) contain a nucleus; exist as both unicellular (ameba and paramecium) or multi-cellular (plants and animals) organisms.
  4. 6. each cell has a function that helps the other cells.
  5. 7. ability of a organsim to maintain stability when the environment changes; staying the same.
  6. 10. "tiny organs" of cells composed of macromolecules.
  7. 11. a group of similar cells that work together to perform a specific function.
  8. 14. a group of organs working together.
  9. 16. an individual form of life.