Biology for grades 6—12 is designed to aid in the review and practice of biology topics. Biology covers topics such as matter and atoms, cells, classifying animals, genetics, plant and animal structures, human body systems, and ecological relationships. The book includes realistic diagrams and engaging activities to support practice in all areas of biology. The 100+ Series science books span grades 5—12. The activities in each book reinforce essential science skill practice in the areas of life science, physical science, and earth science. The books include engaging, grade-appropriate activities and clear thumbnail answer keys. Each book has 128 pages and 100 pages (or more) of reproducible content to help students review and reinforce essential skills in individual science topics. The series is aligned to current science standards.