- Bacteria- large group of unicellular microorganisms that have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
- Endangered- seriously at risk of extinction.
- opponent-someone who competes against or fights another in a contest, game, or argument; a rival or adversary.
- poachers-illegally hunt or catch (game or fish) on land that is not one's own, or in contravention of official protection.