Cell Biology and Scientific Experiments

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. German physiologist and histologist who in 1838 and 1839 identified the cell as the basic structure (7)
  2. 4. Bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb (5)
  3. 6. Having cells that lack membrane-bound nuclei (11)
  4. 10. A netlike structure in the cytoplasm of animal cells (9)
  5. 11. Center of an atom or a cell (7)
  6. 14. A person who relies on another person for support (9)
  7. 15. An organelle in the cytoplasm of a living cell (plural) (9)
  8. 16. A writer or artist who sells services to different employers without a long-term contract with any (11)

Down

  1. 1. A standard or comparison condition used to help judge the effect of a variable in an experiment. (7)
  2. 3. The protoplasm of a cell excluding the nucleus (9)
  3. 5. Something that is likely to vary (8)
  4. 7. Plastid containing ___ and other pigments (11)
  5. 8. The act of conducting a controlled test or investigation (10)
  6. 9. An organelle found in the cytoplasm of most cells (plural) (9)
  7. 12. Any of several complex proteins that are produced by cells and act as catalysts in specific (plural) (7)
  8. 13. A rigid layer of polysaccharides enclosing the membrane of plant and prokaryotic ___ (8)