| 41. | Lower bowel scope for polyps : Every 5 years after 35
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| 42. | Most are actually views of various cancers and colonic polyps.
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| 43. | The screening typically is repeated after three years if polyps are found.
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| 44. | The cancer is generally preceded by formation of colon polyps.
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| 45. | Some, however, omit either the polyp or the medusa stage.
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| 46. | In some species this is thick and the polyps are deeply embedded.
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| 47. | If the stressful conditions persist, the polyp eventually dies.
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| 48. | Division forms two polyps that each become as large as the original.
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| 49. | This suggests that the medusa form evolved after the polyps.
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| 50. | An individual polyp uses both reproductive modes within its lifetime.
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