Which of these groups lacks cell walls? Bacteria Plantae Archaea Animalia

The answer is Animalia. Animal cells don’t have cell walls. A cell wall is a structural layer outside the cell membrane found in Archaea, bacteria, plants, and also some fungi and algae. Its major function is structural support ant protection against environmental stress and infection. Archaea and bacteria are single-celled organisms and the cell wall is important for their survival. In plants, cell wall provides shape and protection.

Archaea and Bacteria have cell walls made of Proteinous nature, Plantae have a cellulose cell wall, however the Kingdom animalia do not have any cell walls.