biosphere crossword 1

2. are the species formed from chemical reactions
9. process all living things go through to create the energy they need to live. Example exchange of 2 gases the cell takes in oxygen and releases carbon dioxide
12. interaction between 2 different organisms living in close relationship
16. the number or quantity of people or organisms or crops that a region supports
17. leaving one place of habitat to live in another place- example
18. organism that cannot make its own food
19. the regions of the surface, atmosphere and hydrosphere of the earth occupied by living organisms
20. chemical process in which green plants make their food. Example plants use energy from the sun to turn water and carbon dioxide into food.
21. relationship between two organisms in which one lives with or on the other and obtains food without damage-
22. the practice of living as a parasite in or on another organism
26. a substance that takes part in and undergoes change during a reaction.
27. the preying of one animal on others
28. a community of animals and plants that interact with their environment

1. one of the groups in which animals and plants of the same genus are divided according to their shared characteristics
3. to search among garbage for food or something useful
4. animals that eat only plants
5. the process by which the structure of a biological community evolves over time.
6. the total number of people who live in a place
7. is a double membrane bound organelle found in most eukaryotic organisms.
8. a group of people who live in the same area or have something in common
10. species hardy species which are the first to colonize
11. a change that a living thing goes through so that it fits better in its environment
13. animals that eat plants and animals
14. going from one place to the next
15. environmental conditions that limit the growth abundance or distribution of an organism or population in an ecosystem
16. tiny parts in a plant cell that contain chlorophyll and the place where photosynthesis occurs.
23. makes its own food
24. animals that eat only meat
25. a relationship that benefits 2 organisms- example pollination- bee takes nectar from flowers