Identify the correct statements about symbiotic relationships:
I: | in a parasitic relationship, one organism is harmed and the other is benefited. |
II: | coevolution is a feature of many symbiotic relationships. |
III: | a relationship that appears to be commensalism may in fact be mutualistic or parasitic. |
IV: | the most efficient type of parasite is one that kills its host. |
1. | I, II and III only | 2. | I, III and IV only |
3. | II, III and IV only | 4. | I, II, III and IV |
Flowers and their insect pollinators must undergo co-evolution because:
1. | Without pollinators plants may get extinct |
2. | Plants have to reward the pollinators |
3. | The relationship must be safeguarded against cheaters |
4. | Insects are the major pollinators of plants |