Chapter 18 and 19 Biology

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Across
  1. 3. the study of organisms in their environment
  2. 5. a group of organisms that feed on organic waste materials
  3. 8. the complete loss of a species from Earth
  4. 12. a greenhouse gas that is produced in cattle farming
  5. 14. the number of different species that live in an area
  6. 15. captive _______ is keeping animals in captivity and allowing them to breed, in order to increase the numbers in the population
  7. 16. the process where fossil fuels are burnt and release carbon into the atmosphere
  8. 17. the stage in a population growth curve where the population remains roughly constant is called the ______ phase
Down
  1. 1. a process of looking after the natural environment to maintain or increase the biodiversity of an area
  2. 2. an event caused by the addition of extra plant nutrients to water, resulting in a decrease in the concentration of dissolved oxygen
  3. 4. all of the populations of all the different species in an ecosystem
  4. 6. an area of ground covered by a single crop
  5. 7. an organism that gets its energy by eating plants
  6. 9. addition to the environment of something that harms it
  7. 10. the process of converting ammonium ions to nitrate ions
  8. 11. the animal that was featured in the last video Year 11-Science watched in 10th October 2023 Biology class.
  9. 13. the stage in a growth curve where the population grows at its maximum rate