Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.

Ex Input:
The types of white blood cells that arrive at an inflamed site depend on the nature of what?

Ex Output:
genes

Ex Input:
Which structure includes sugar-phosphate "backbones", composed of alternating phosphate groups and deoxyribose sugars, and nitrogenous bases?

Ex Output:
molecule double helix

Ex Input:
What process is involved in the formation of a waterfall, when a stream flows from an area of harder to softer rock?

Ex Output:
calcification