Squeaks wants to know more about the biggest flower in the world! So Mister Brown teaches him all about this stinky, weird plant - called Rafflesia arnoldii! Disciplinary Core Idea: LS2.A: Interdependent Relationships in Ecosystems - Plants depend on water and light to grow (2-LS2-1). Plants depend on animals for pollination or to move their seeds around (2-LS2-2). Performance Expectations: 2-LS2-1 Plan and conduct and investigation to determine if plants need sunlight and water to grow 2-LS2-2 Develop a simple model that mimics the function of an animal in dispersing seeds or pollinating plants.