Across
- 2. species that is experiencing a rapid population decline and is in danger of becoming extinct if the drop in numbers continues
- 4. the chemical in plants that traps energy from the sun and gives plants their green colour
- 6. an animal that eats other animals
- 8. organisms that get the energy they need by breaking down dead matter and waste products
- 10. an interaction between two organisms in which one of them benefits but the other one is not affected
- 12. breeding the process of mating one breed of plant or animal with another breed of that plant or animal (e.g. cattle)
- 14. regular burning to reduce the amount of fuel available for a fire
- 15. an animal that is eaten by a predator
- 17. the flow of energy from organism to organism in a series of feeding relationships
- 19. individuals that are exactly the same as each other
Down
- 1. a method of controlling unwanted pests by using a natural predator or disease
- 3. the place where all life exists; consists of earth and its atmosphere
- 5. an interaction in which one type of organism (the parasite) lives on or in another type of organism (the host); the host is usually harmed or even killed
- 7. native vegetation that remains unchanged when surrounding areas have been changed by activities such as grazing or forestry
- 9. an organism able to manufacture its own food; plants are producer organisms
- 10. part of the stem, root or leaf that is able to grow into a new plant
- 11. an interaction between organisms in which both the organisms benefit from the relationship and neither is harmed
- 13. area along the banks of rivers and streams that is flooded when water levels are high
- 16. a number of food chains combined
- 18. raised bank built to prevent water reaching buildings