The best replacement for animal cells is plant cells.

The best alternatives to animal cells are rated as following:
★★★★★  plant cells
★★★★★  human cells
★★  bacterial cells
★  plants cells
★  plant cell
★  vegetal cells
★  viruses
  plant
  mitosis in plant cells
  plant cells compare and contrast
  yeast cells
  plant cells larger
  fungal cells

Your alternative for animal cells is not listed? Suggest!
Speaking about animal cells, one probably shouldn't forget about plant cells.

Other search terms related to animal cells and their ratings are:
★★★★★ plant cells
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animal cells
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