1. Plants exhibit chemotropism when their roots grow towards a higher concentration of nutrients in the soil.
植物的根向土壤中浓度较高的营养物质方向生长时表现出化学性屈性。

2. The behavior of certain bacteria, such as moving towards or away from specific chemicals, is attributed to chemotropism.
某些细菌的行为，如向特定化学物质移动或远离，被归因于化学性屈性。