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CK-12 Foundation
Ck 12: Biology: Community Ecology Study Guide
This comprehensive study guide covers the main terms and concepts needed for a unit on community ecology.
CK-12 Foundation
Ck 12: Biology: Birds Study Guide
This comprehensive study guide covers the main terms and concepts needed for a biology unit on birds.
CK-12 Foundation
Ck 12: Biology: Fish Study Guide
This comprehensive study guide covers the main terms and concepts needed for a biology unit on the structure and classification of fish.
CK-12 Foundation
Ck 12: Biology: Amphibians Study Guide
This comprehensive study guide covers the main terms and concepts needed for a biology unit on amphibians.
Oswego City School District
Regents Exam Prep Center: Biotic vs. Abiotic
This NY Regents prep site provides a nice overview of what abiotic and biotic factors of an ecosystem are, as well as a brief description of carrying capacity.