ecology

4. in a food chain or web
8. - An organism that breaks down wastes and dead organisms
9. - A consumer that eats other animals
11. - The increase in chemical concentration of toxins in animal tissues as the
15. - System on earth that includes all the living things
16. - Scientific study of interactions among organisms and between organisms and their
18. lakes, oceans, coral reefs wetlands & other biological communities
19. - Living factors in a habitat

1. - The variety of living things in an area
2. - Organism that cannot make its own food; also called heterotrophs
3. - The struggle between organisms to survive in a habitat with limited resources,
5. - Type of biodiversity that is based on the variety of forests, deserts, grasslands,
6. and the other is neither harmed nor benefited
7. - A relationship between two organisms of different species where one
9. - All the living things in an ecosystem
10. Rate - The number of births during a specific set of time
12. moves up the food chain
13. Rate - The number of deaths during a specific set of time
14. - Single-celled organisms that do not have a nucleus; often classified as
17. Capacity - Largest number of individuals of a population that an environment can
18. as walleye and sturgeon competing for food