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Across 5. the variety in living organisms. Has three main components, species, genetic and ecosystem 7. A kingdom consisting of organisms that form thread like hyphae and feed by extracellular digestion 9. A group of similar organisms that can breed to produce fertile offspring 11. in this type of key there are two possible answers to each question 12. slightly elongated cells that form a supporting plant tissue. Walls are strengthened with extra cellulose 13. The kingdom containing bacteria 15. The place where a community of organisms is found 18. When there are no living member of a species left in the wild or captivity 19. A area of aplant stem or leaf that contains vessels that transport water and the products of photosynthesis 20. The visible characteristics of an organism 21. The evaporation of water from the leaves of a plant 25. A verson of a gene 26. The chance increase or decrease in allele frequency over time 33. Transports water throughout the plant 34. A description of an organism in terms of the alleles it contains 35. A process whereby organisms become better adapted to their environment 36. A leaf from an embryo plant inside a seed 37. All the living organisms found in a particular place at a particular time 38. a renewable energy source 39. A waterproff polymer found in sclerenchyma and xylem

Down 1. The prcess whereby there is a gragual change in the genetic makeup of a species over timd 2. small fluid filled channels that link the cytoplasm of one plant cell with its neighbours 3. Large molecules which can be broken into smaller ones by bacteria and fungi 4. This type of fuel is formed from organisms that lived a long time ago 6. The system whereby each organism is given a unique two part Latin name 8. The kingdom containing protozoa 10. A relationship betwen different organisms that require the same resources. they may be from the same or different species 14. All the living and non-living features of an environment 16. The role of an organism in its environment 17. Use of resources that does not damage or reduce those resources in the long term 22. a level of classification between family and species 23. Changes in the genetic material of a cell 24. The scientific study of classification 27. A group of individuals belonging to the same species found in a particular place 28. A plant vessel that transports the products of photosynthesis by mass flow 29. The features of an organism that make it suited to survive in its environment 30. The incidence of alleles in a population changes over tme and is known as allele ... 31. A 5C monosaccharide that helps bind cellulose molecules together in plant cell walls 32. Helps cement plant cells together