Predator:
1. It feeds on another organism called prey.
2. Predator is larger and stronger than the prey.
3. It kills the prey.
4. Predator feeds on killed prey.
5. It feeds over the prey from outside.
6. Predator comes in contact with prey for catching and eating.
7. There is progressive development of characters or evolution.
8. In predator-prey relationship the stronger organism is benefitted.
Parasite:
1. It feeds on another organism called host.
2. Parasite is smaller and weaker than the host.
3. Parasite does not immediately kill the host though the latter may die of prolonged exploitation.
4. It feeds on living host.
5. Parasite may feed over the host from outside or inside.
6. It may have temporary or permanent contact with the host.
7. Many of the characteristics undergo retrogression in the parasite.
8. In parasite-host relationship a weaker organism is benefitted.
9. Host specificity is more common.
