National Geographic
National Geographic: Symbiotic Relationships in Marine Ecosystems
In this lesson students analyze videos to make observations about species, populations, and communities of organisms and discuss their symbiotic relationships. Then they create a hypothetical marine ecosystem and describe the adaptive,...
MadSci Network
Symbiotic Relationships in the Deciduous Forest
A brief definition of symbiotic, followed by explanations of mutualism, commensalism, and parasitism.
NC State University
North Carolina State University: Symbiotic Relationships
Includes a description of symbiosis in general, then lists and defines types of symbiosis including mutualism, commensalism, parasitism, competition, and neutralism. Includes a chart which summarizes the different types of relationships....
CK-12 Foundation
Ck 12: Life Science: Symbiotic Relationships of Fungi
[Free Registration/Login may be required to access all resource tools.] Fungi don't live in isolation. They often interact with other species. In fact, fungi can be dependent on another organism for survival. When two species live close...
Science Struck
Science Struck: Symbiotic Relationships in the Deciduous Forest
Explains what a symbiotic relationship is, the five main types of symbiosis, and provides examples of symbiotic relationships among living things in a deciduous forest.
Science Struck
Science Struck: Mutualism Relationships
Learn how mutualism benefits the organisms in a symbiotic relationship and what the different types of mutualism are. Provides lots of examples.
CK-12 Foundation
Ck 12: Biology: Symbiotic Relationships of Fungi
[Free Registration/Login may be required to access all resource tools.] Discusses parasitic and mutualistic relationships of fungi.
Science Struck
Science Struck: Symbiotic Relationships in the Desert
Describes three types of symbiotic relationships that can be found in a desert biome.
PBS
Pbs Learning Media: Historic Relationships Between Dogs and Humans
In this video segment from Nature, learn the history of the world's first domesticated animal, the dog. [7:34]
Other
Pde Sas: Relationships Among Organisms
In this lesson, students compare various types of relationships among organisms (i.e., biotic interactions). Students will: explain the roles of producers and consumers, and predators and prey in an ecosystem. Explain the levels of order...
Sophia Learning
Sophia: Symbiotic Relationships: Lesson 2
This lesson will introduce the three types of symbiotic relationships and give examples of each. It is 2 of 4 in the series titled "Symbiotic Relationships."
Sophia Learning
Sophia: Symbiotic Relationships: Lesson 4
This lesson will introduce the three types of symbiotic relationships and give examples of each. It is 4 of 4 in the series titled "Symbiotic Relationships."
CommonLit
Common Lit: "Can't We All Just Get Along?" by Bird Brain Science
Earth is full of a variety of living things that interact with one another in many different ways. This informational text explains the various different types of relationships they can have with one another. It also offers guided...
University of Hamburg
University of Hamburg: Symbiosis & Normal Microbiota
A diagram of the different types of symbiosis. There are 4 examples of symbiotic relationships and explanations. Read this page and then give yourself a quiz.
Science Education Resource Center at Carleton College
Serc: It Takes Teamwork: How Endosymbiosis Changed Life on Earth
A tutorial on symbiotic relationships that explores the differences between prokaryotic and eukaryotic cells as well as the origins of eukaryotic organelles possibly being from endosymbiotic relationship. This tutorial also offers...
CK-12 Foundation
Ck 12: Episd: Symbiosis
[Free Registration/Login may be required to access all resource tools.] Identify and understand the various types of symbiotic relationships. Recognize the three primary kinds of symbiosis.
University of South Florida
Project Oceanography: Single Celled Organisms [Pdf]
For this lesson, students explore three kinds of symbiotic relationships involving unicellular organisms. They will also look more closely at the relationship between zooxanthellae and coral, and the importance of nitrogen-fixing...
Science Struck
Science Struck: Symbiotic Relationships in the Tundra
Explains what mutualism, commensalism, and parasitism look like in a tundra biome.
Science Struck
Science Struck: Symbiotic Relationships in the Rainforest
Explains what mutualism, commensalism, and parasitism are.
CK-12 Foundation
Ck 12: Life Science: Symbiosis
[Free Registration/Login may be required to access all resource tools.] Symbiosis describes a close and long-term relationship between different species. At least one species will benefit in a symbiotic relationship. There are three...
CK-12 Foundation
Ck 12: Life Science: 12.9 Symbiosis
Learn about the many types of symbiotic relationships in an ecosystem.
CK-12 Foundation
Ck 12: Biology: Symbiosis
[Free Registration/Login may be required to access all resource tools.] Overview of symbiotic relationships.
Other
Marine Studies: Symbiosis
View graphics of a mimic octopus, frog fish, snake eel, hermit crab and clown fish. Discover how they form symbiotic relationships.
Science Struck
Science Struck: Examples of Commensalism
Describes examples of commensal relationships in the natural world.