Unit 1: Cell theory & Living Things

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Across
  1. 3. the study of living organisms
  2. 5. an infective agent that typically consists of a nucleic acid molecule in a protein coat
  3. 7. German physician
  4. 8. a method of procedure that has characterized natural science
  5. 11. the description of an observed phenomenon
  6. 17. first to visualize a micro-organism
  7. 19. German physician and physiologist
  8. 20. a member of a large group of unicellular microorganisms which have cell walls but lack organelles
  9. 21. co-founder of cell theory
Down
  1. 1. Someone of spanish origin that studies cells.
  2. 2. the tendency toward a relatively stable equilibrium between interdependent elements
  3. 4. atom, molecule, macromolecule, organelle, cell, tissue, organ, organ system, organisms, population, community, ecosystem, biome and finally biosphere.
  4. 6. Romanian-American cell biologist
  5. 9. a claim made by scientists
  6. 10. Ernest Everett
  7. 12. an organism consisting of a cell or cells in which the genetic material is DNA
  8. 13. a microscopic single-celled organism that has neither a distinct nucleus with a membrane
  9. 14. a single-celled organism
  10. 15. a subcellular structure that has one or more specific jobs to perform in the cell
  11. 16. The basic structural and functional unit of living organisms
  12. 18. theory that cells are the basic structural