ecology

2. Scientific study of interactions among organisms and between organisms and their
5. moves up the food chain,
10. lakes, oceans, coral reefs wetlands & other biological communities,
11. - The increase in chemical concentration of toxins in animal tissues as the
13. as walleye and sturgeon competing for food,
14. and the other is neither harmed nor benefited,
15. A relationship between two organisms of different species where one
16. System on earth that includes all the living things,
18. Rate - The number of births during a specific set of time,
20. celled organisms that do not have a nucleus; often classified as

1. in a food chain or web,
3. Capacity - Largest number of individuals of a population that an environment can support,
4. Type of biodiversity that is based on the variety of forests, deserts, grasslands,
6. All the living things in an ecosystem,
7. An organism that breaks down wastes and dead organisms,
8. A consumer that eats other animals,
9. Organism that cannot make its own food; also called heterotrophs,
12. The variety of living things in an area,
14. Living factors in a habitat,
17. The struggle between organisms to survive in a habitat with limited resources,
19. Rate - The number of deaths during a specific set of time,