Subphylum Crustacea Phylum Arthropoda The Crustaceans (Subphylum Crustacea) include crabs, lobsters, shrimp, barnacles and many others. They live in the ocean and freshwater...(Read more...)
National Science Standards for Animals (Wildlife)

3. Life Science Standards
Science subject matter focuses on the science facts, concepts, principles, theories, and models that are important for all students to know, understand, and use.
K-4 Characteristics of organisms, life cycles of organisms, organisms and environments.
5-8 Structure and function in living systems, reproduction and heredity, regulation and behavior, populations and ecosystems, diversity and adaptations of organisms.
9-12 The cell, molecular basis of heredity, biological evolution, interdependence of organisms, matter, energy, and organization in living systems, behavior of organisms.