Plants develop following defence mechanisms
(a) (i) Thorns are (morphological) means of defence.
(ii) Plants may produce/store chemicals such as nicotine, strychnine etc. for defence which inhibit digestion/disrupts reproduction/kill the predator//Calotropis produces. highly poisonous cardiac glycosides//plants may produce chemicals such as nicotine/ caffeine/ quinine/ strychnine/ opium are produced as defence.
(b)
| S.No. |
Parasitism |
Predation |
| 1. |
Lives and feed on the host |
Only feeds on prey. |
| 2. |
host specific |
prudent / not prey specific. |
| 3. |
Co-evolve with the host. |
Control / check prey population. |
