Question
- Explain any two defence mechanisms plants evolved against their predators.
- How does predation differ from parasitism?
✓
Answer
- Thorns are (morphological) means of defence.
- produce/store chemicals which inhibit digestion/disrupts reproduction/kill/Calotropis produces highly poisonous cardiac glycosides/plants may produce chemicals such as nicotine/caffiene/quinine/strychnine/opium are produced as defence.
| Parasitism | Predation |
| Lives & feed on the host. | Only feeds on prey. |
| host specific. | prudent/not prey specific. |
| Co-evolve with the host. | Control/check prey population. |
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