Across
- 2. Something that causes cancer, such as tar in tobacco smoke
- 5. Substance that diffues across a synapse to pass an electrical impulse between two neurones
- 7. When the alleles for a genotype are different
- 9. The alleles for a certain characteristic that are found in an organism
- 10. Microorganism that causes disease
- 11. Stimulant in tobacco smoke that is addictive
- 12. Type of cell that receives a stimulus and converts it into an electrical impulse
- 13. Damage to the liver caused by drinking large amounts of alcohol over a long time
- 16. Substance that is used to stop the spread of pathogens
- 18. Hormone released by pancreas which causes the conversion of glycogen to glucose
- 21. Narrowing of the blood vessels
- 22. The physical characteristic of an organism
- 24. Organism that makes its own food, such as a plant
- 26. Widening of the blood vessels
- 27. Disease in which the body cannot control blood glucose concentration at the correct level
- 29. A long thread of a molecule called DNA
- 31. Set of plant hormones that can cause seeds to germinate; and fruits and flowers to form
- 33. Point at which two neurones meet
- 34. Organism that transfers a pathogen from one person to another
- 35. a substance which changes the way the body works
- 36. Hormone released by pancreas when blood glucose levels are too high
- 37. Type of bacteria that convert nitrates into nitrites
- 38. A stored form of glucose
- 40. The long extension of a neurone that carries an electrical impulse away from the cell body towards other neurones
- 41. A feeding relationship where one organism is benefited and one is harmed
Down
- 1. A cell that transmits electrical impulses
- 3. Type of bacteria that can take nitrogen from the atmosphere and convert it into ammonia
- 4. Illness that is caused by a microorganism and can be caught from an infected person (two words)
- 6. consumer An organism that eats producers (two words)
- 8. Tropism in response to gravity
- 14. A disease caused by alleles (two words)
- 15. The addition of chemicals to water, such as nitrates, which encourages plant growth
- 17. Muscle or gland in the body that performs an action when an impulse from the nervous system is received
- 19. Antibiotic that kills or slows the growth of microorganisms
- 20. Tropism in response to light
- 23. Controlling the internal environment of the body at optimum conditions
- 25. Type of bacteria that break down nitrates to nitrites
- 28. A gland that makes and releases hormones
- 30. When the alleles for a genotype are the same
- 32. A change in the environment that is detected by a receptor cell
- 39. A section of DNA that carries the instructions for a characteristic