Biology extra credit

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Across
  1. 3. – Stated that all cells come from pre-existing cells.
  2. 6. – Gel-like substance inside the cell containing organelles.
  3. 7. – Comparison that limits cell size; smaller cells are more efficient in exchanging materials.
  4. 10. – Proposed that all plants are made of cells.
  5. 11. – States that all living things are made of cells, cells are the basic unit of life, and all cells come from existing cells.
  6. 12. – First to observe living cells and microorganisms under a microscope.
  7. 14. – DNA and protein complex found in the nucleus; condenses into chromosomes during cell division.
  8. 15. – Specialized structure within a cell that performs a specific function.
Down
  1. 1. – Simple cell without a nucleus or membrane-bound organelles (e.g., bacteria).
  2. 2. – Semi-permeable barrier controlling what enters and leaves the cell.
  3. 4. – Scientist who discovered and named cells while observing cork.
  4. 5. – The fluid part of the cytoplasm in which organelles are suspended.
  5. 8. – The basic structural and functional unit of all living organisms.
  6. 9. – Proposed that all animals are made of cells.
  7. 13. – Complex cell with a nucleus and membrane-bound organelles.