Final answer:
The spigots in the sink model of ALD represent enzyme function, while the drain represents the removal of excess molecules.
Step-by-step explanation:
The significance of the spigots and the drain in the sink model of ALD is that they represent enzyme function and the removal of excess molecules, respectively.
- Spigots represent enzyme function, acting as channels or pathways through which substances can flow in and out of a cell or organism.
- The drain symbolizes the removal of excess molecules, toxins, or waste products from the system, helping to maintain homeostasis.
Therefore, the correct answer would be option 1: Spigots represent enzyme function, drain removal of excess molecules.