Defence-Systems

Physical Responses

  • All plant cells have a cellulose cell wall which is difficult to penetrate
  • Leaves are covered with waxy cuticle which is difficult to penetrate
  • Layers of dead cells surrounding stem which is difficult to penetrate such as bark

Chemical Responses

  • Plants can release chemicals such as poisons and antibacterial

Mechanical Responses

  • Sharp thorns
  • Hairs which irritate mouth of animals
  • Leaves that droop or curl to scare animals
  • Mimicry