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Science: Week #1 Life Science Crossword Puzzle

Across
An organism that can only be seen with a microscope
The unit from which all organisms are made
A living thing, capable of making and using energy, reproducing, growing and changing, responding to its environment and getting rid of wastes
The tiny "factories" inside cells
Down
Tissues combine to form these; the heart is an example of one
Made up of only one cell
Tiny "tails" on some microorganisms that help them move
Cells combine to form this bone, muscle and nerves are examples