1. The plant's branches exhibit organotropism, growing towards the direction of sunlight.
这种植物的树枝表现出有机体向阳光方向生长的趋向性。

2. The study of organotropism in animals focuses on how different tissues and organs respond to specific stimuli.
动物有机体性的研究关注于各种组织和器官如何对特定刺激做出响应。