Ecosystems

1. eat food from another source either animal or plant
7. producing offspring to ensure the survival of the species
10. a variety of different organism living together in an ecosystem
13. a system formed up by organisms (biotic) interacting with each other and their nonliving (abiotic) surroundings in a balanced way.
15. organelle where photosynthesis occurs
18. a relationship where one organism (the parasite) lives in/on the body of another organism (the host). The parasite benefits but the host is harmed (+-)
19. organisms cooperating with each other to ensure survival
20. a group of organism of the same species living in a community
21. They break down dead animals and plants and return vital nutrients to the soil.
23. a relationship between two organisms; where one organism benefits and the other is unaffected (+0)
25. the one being attacked
26. tiny pores on the leaf that take in CO2 ( carbon dioxide )
27. when one organism kills and eats the other organism.

2. a close and physical relationship between two different species
3. a living thing e.g animal or plant
4. where an organism lives because their particular needs are met by the resources available in the habitat e.g food and shelter
5. single line of energy ( food ) flow
6. animals that live in the same habitat and eat the same food
8. where the water travels up through the plant to leave
9. living organism
11. when organisms use/compete for the same limited resource
12. the sugars produced during photosynthesis plus oxygen to produce energy for plant growth.
14. plants use water and carbon dioxide to produce glucose and oxygen
16. makes its own energy ( food ) e.g plants
17. non-living object
22. the attacker
24. a relationship between two organisms where both benefit (++