Across
- 3. / mutations in eggs and sperm can cause birth ______ and miscarriages
- 5. / the ______ system causes movement
- 7. / simple multicellular organisms reproduce simply by dividing in two in a process called ______ reproduction
- 8. / the ______ system extracts nutrients from food
- 10. / a collection of similar cell that carry out specific function
- 13. / consisting of a single cell
- 14. / a spiral shape
- 16. / small structures inside cells
- 18. / the ______ system transports nutrients and oxygen to cells
- 19. / signal travelling along a neurone
- 20. / prior to cell division the chromosomes ______
- 21. / ______ factors will affect characteristics such as muscular development
- 30. / ______ diseases are caused by malfunctions in the body (2 words)
- 32. / the ______ system coordinates the body via hormones released by glands
- 33. / cell division needed to produce the egg and sperm cells for sexual reproduction
- 35. / a unit with coded genetic information, found on a chromosome
- 36. / the ______ system produces offspring (for species survival)
- 38. / the body's first line of defence is the ______ barrier formed its inner and outer surfaces
- 40. / ______ can also be mutagenic (e.g. UV rays from the sun)
- 42. / the ______ system extracts oxygen from the air
- 43. / the constant process of regulating the body's internal environment
- 44. / the unit that makes up living organisms
- 46. / cancer-causing chemicals
- 48. / disease-causing organisms
- 51. / ______ can be mutagenic (e.g. substances found in tobacco)
- 52. / Pencillin is an example of this type of substance used against infectious bacteria
- 54. / chemical messengers released by glands
- 55. / occurs when normal function is disrupted in some way
- 56. / genetically identical organisms
Down
- 1. / ______ factors will affect characteristics such as eye colour
- 2. / _______ transmitted diseases are spread from person to person
- 4. / ______ or non-identical twins develop from different eggs, fertilised separately by different sperm
- 6. / the body's final line of defence is the _______ response, involving antibody production
- 9. / a mass of cells caused by the uncontrolled division of cells in body tissues
- 11. / in ______ reproduction, a male and female parent each contributes half of the offspring’s first cell
- 12. / consisting of many cells
- 15. / enables a cell to make everything it needs in order to function (2 words)
- 17. / movement of particles from an area of high concentration to an area of low concentration
- 22. / ______ response is the body's second line of defence, involving white blood cells
- 23. / a structure made up of different tissues that carries out a specific function
- 24. / the ______ system extracts cellular wastes from blood for removal from body
- 25. / the ______ system supports the body and protects the brain, heart and lungs
- 26. / the risk of cells containing mutations increases with age and can cause ______
- 27. / ______ transmitted diseases are spread via intermediary agents
- 28. / healthy cells undergo mitosis to ______ tissues by replacing damaged cells
- 29. / special type of cell division which takes place in the ovaries and testes to produce eggs and sperm for sexual reproduction
- 31. / the ______ system coordinates the body via electrical impulses in nerves
- 32. / mutations provide genetic variation for ______ to occur
- 34. / a harmful tumour is called ______
- 37. / a group of organs that work together to carry out a specific function (2 words)
- 39. / substances that speed up chemical reactions
- 41. / the cell structure that contains the chromosomes
- 45. / a role of cell division
- 46. / a threadlike ‘string’ of genes
- 47. / ______ diseases are caused by pathogens invading the body
- 49. / molecules that act as catalysts in the body
- 50. / alterations to a cell’s DNA
- 53. / as an organism ______ the number of cells containing mutations builds up
- 55. / the chemical substance that makes up chromosomes