ocr: Learning Extra 3 Layers ofl Life Vocabulary List Decay To rot, decompose. Drip Tips Leaves come to a point allowing water to drip off. Humidity The amount of water or water vapor present in the air. Invertebrate An animal without an internal skeleton or backbone. Niche The ecological role of a species, such as producer, consumer, decomposer, and scavenger. Niche may also mean the physical space occupied by a species.
