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Animal Cells: Cells Without Walls
1. Animals make up ______ species on Earth.
A. one of every two
B. three of every four
C. three of every five
D. six of every seven
2. Which of these is NOT an animal?
A. worms
B. algae
C. jellyfish
D. coral
3. What is the difference between plant cells and animal cells that give animals the ability to
Plant cells have cell walls that make their cells rigid. Plant cells keep their shape. Animal cells do not
have a cell wall. The shape of animal cells can change.
4. Plant cells have ______; animal cells do not.
A. vacuoles
B. chloroplasts
C. all of the above
5. The ______ forms the outside layer of an animal cell.
cell membrane