biodiversity and photosynthesis

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Across
  1. 4. A sampling technique to estimate the number of animals in an area (7,4)
  2. 5. Plants form this from glucose molecules as a way to store them (6)
  3. 7. Natural energy source for photosynthesis (8)
  4. 9. A raw material for photosynthesis (5)
  5. 10. The way organisms are spread out in their environment (12)
  6. 12. Features that help living organisms survive in their particular environment (11)
  7. 15. Used to test for the presence of starch (6)
  8. 16. A product of photosynthesis (6)
  9. 17. Present in green leaves: required for photosynthesis to take place (11)
  10. 18. Process by which green plants convert carbon dioxide and water into glucose (14)
Down
  1. 1. A sampling technique to estimate the number of plants in an area (7)
  2. 2. An “abiotic factor” (11)
  3. 3. A product of photosynthesis (7)
  4. 6. An “abiotic factor” (5,9)
  5. 8. Defined as the variety of living things (12)
  6. 11. A raw material for photosynthesis (6,7)
  7. 13. A use for plants (7)
  8. 14. Extracted from plants (9)