Why do animal cells lack cell walls?

Animal cells do not have cell walls as there is no requirement. It does not have any role to play in the way animals grow or the way animals move. You can read about the Plant Tissues – Classification, Definition, Types in the given link.

Further readings:

  1. Science & Technology Notes For UPSC – General Science Notes 
  2. Science & Technology Questions in UPSC Mains GS-3

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