Explore the intriguing world of mollusks and echinoderms with 'Functions Groups Roles and Characteristics.' Perfect for Grade 6-8 students this book is a crucial tool for educators homeschooling parents and librarians. It highlights the importance of these marine creatures in the US STEM curriculum detailing their unique characteristics life cycles and contributions to aquatic ecosystems. Engage students in science by unveiling the mysteries of the ocean's invertebrates.