7.1 Crossword

2. the spread of desert like conditions
4. cycle the various stages of an organisms development and reproduction
5. a major ecological community such as grassland, tropical rain forest, or desert
8. transfer the transfer of energy from one organisms to another through a food chain or web
12. chain a model that shows one set of feeding relationships among living things
14. a large category of animal is without backbones
16. The many different types of life that exist in an environment

1. relationship between organisms in which one depends on the other
3. all the living and nonliving things that surround an organisms
6. an animal's natural response to a stimulus
7. Forest a forest that is humid and rainy for much of a year
9. consists of living and non living things in their environment
10. Web a model that shows many different feeding relationships among living things
11. Diversity the presence of many different types of organisms in an ecosystem
13. the many different types of life that exist in an environment
15. the location in which an organism lives
17. the ability to do work or cause change