Unit 4 Ecosystem Review

1. - The natural environment where a species lives.
4. - An animal that feeds only on other animals.
7. - A characteristic that helps an organism survive in its environment.
8. - A diverse underwater ecosystem formed by coral.
9. - A hot, arid ecosystem with diverse plant and animal adaptations.
10. - Organisms introduced to new habitats, often disrupting native ecosystems.
11. - Poisonous substance that can accumulate in organisms.
12. - A plant with adaptations for conserving water, common in deserts.
15. - A small desert animal known for surviving without direct water intake.
16. - Contaminants introduced into the environment, often by humans.
17. - At risk of extinction due to habitat loss or other factors.
18. - The buildup of substances, like toxins, in an organism over time.

1. - An organism that feeds only on plants.
2. - The variety of life within an ecosystem.
3. - The increase of toxin concentration at higher levels in a food chain.
5. - A community of living organisms interacting with their environment.
6. Web - A system of interdependent food chains within an ecosystem.
12. - A toxin found in reef fish, dangerous when consumed by humans.
13. - Active at night to avoid daytime heat.
14. - A plant that grows in rainforests, providing habitats for certain animals.