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Cell Theory

Use your notes to complete the crossword puzzle.
Across
Keeping conditions inside of the organism within tolerable limits
Scientist who determined that all animal tissue is composed of cells
Scientist who first named cells
Producing offspring (sexually or asexually)
Protection against enemies
Obtaining food to provide energy for growth
Chemical reactions inside of the cell
Down
Scientist who improved the microscope and first observed protozoa and bacteria
Cell that does not have a nucleus
Scientist who concluded that all plant tissue is composed of cells
Robert Hooke first observed cells by looking through a microscope at _______ bark
Perceiving and responding to changes in the environment
Cell that does not have a nucleus
Scientist that proposed that all cells result from the division of existing cells