a. Plants developed the following defence mechanisms:
i. Thorns as means of defence.
ii. Plants may produce chemicals such as nicotine, caffeine, quinine, strychnine, opium for defence.
b
| Parasitism |
Predation |
1. The parasite lives and feeds on the host.
2. The parasite is host specific.
3. The parasite coevolves with the host. |
1. The predator only feeds on prey.
2. The predator is not prey specific.
3. The predator keeps a check on prey population. |
