Which statement is the most accurate description of animal cells?
1) Animal cells are tiny units of life that contain water and are surrounded by a cell wall.
2) Animal cells are tiny units of life that contain substructures and are surrounded by a cell membrane.
3) Animal cells are tiny units of life that contain substructures and are surrounded by a cell wall.
4) Animal cells are tiny units of life that contain plasma and are surrounded by a cell membrane.