If you are doing an Ecology unit, these vocabulary words are a great addition to the classroom. You can use these as visuals around the class, or you can make a fun game out of them having the learners organize themselves in order! These definitions are straight from the Miller and Levine Biology book chapter 3.1 
 
This download includes 6 pages of black and white vocabulary words (you can print on fun colored paper and laminate as shown in photos.)
 
Please consider leaving me a review :) thank you, and happy teaching!