Which of the following statements is not true about ecosystems?
1. A healthy ecosystem can support an unlimited number of life forms.
2. The parts of an ecosystem depend on each other.
3. Predators play a role in balancing the earth's ecosystems.
4. People's activities can improve the health of an ecosystem.
1. A healthy ecosystem can support an unlimited number of life forms. This is not true because a healthy ecosystem is sustainable with the amount of resources it has, this is not possible with an unlimited number of lifeforms.