Encyclopedia of Earth
Encyclopedia of Earth: Evolutionary Biology: Symbiosis
Article describes the different types of symbiosis, some of which are of mutual benefit, and others not. It also explains the differences between endosymbiosis and exosymbiosis, where one organism lives either inside or else upon the...
National Geographic
National Geographic: Ecological Relationships
In this lesson, students learn about different types of ecological relationships, including symbiosis, mutualism, commensalism, and parasitism. Includes handouts and a vocabulary list with definitions.
Other
Pde Sas: Relationships Among Organisms
In this lesson, young scholars 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...
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....
Other
The Sea Slug Forum: Symbiosis and Commensalism
Question and answer site that contains a discussion of commensalism as it pertains to sea slugs. Nice photographs of aquatic commensalistic relationships.
Texas Education Agency
Texas Gateway: Symbiosis
Given scenarios or illustrations, the student will determine the nature and type of relationship between organisms, including parasitism, commensalism, mutualism, and competition.
University of Nebraska
University of Nebraska State Museum: Parasite Sleuth: Where Parasites Live
This site highlights 10 parasites, including worms, insects, ticks and microorganisms. For each organism you can get information concerning their life cycle and geographic distribution.
TED Talks
Ted: Ted Ed: How Brain Parasites Change Their Host's Behavior
The biggest challenge in a parasite's life is to move from one host to another. Intriguingly, many parasites have evolved the ability to manipulate the behavior of their hosts to improve their own survival- sometimes even by direct brain...
TED Talks
Ted: Ted Ed: Parasite Tales: The Jewel Wasp's Zombie Slave
This is stranger than science fiction. The jewel wasp and the cockroach have a disgusting and fascinating parasitic relationship. The jewel wasp stuns the cockroach, and months later, a jewel wasp hatches out of the cockroach. At...
Scholastic
Scholastic: Study Jams! Science: Ecosystems: Symbiosis
Symbiosis is featured in this video to help students understand the process through an engaging video. Know terms like parasites and mutualism to be successful on the test.
CK-12 Foundation
Ck 12: Biology: Interdependence of Living Things
[Free Registration/Login may be required to access all resource tools.] Covers interactions between organisms.
CK-12 Foundation
Ck 12: Biology: Symbiosis
[Free Registration/Login may be required to access all resource tools.] Overview of symbiotic relationships.
MadSci Network
Symbiotic Relationships in the Deciduous Forest
A brief definition of symbiotic, followed by explanations of mutualism, commensalism, and parasitism.
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.
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...
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.
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: Life Science: 12.9 Symbiosis
Learn about the many types of symbiotic relationships in an ecosystem.
PBS
Pbs Learning Media: Pbs News Hour: The Final Fight Against Guinea Worm Lesson Plan
Former President Jimmy Carter visits Sudan on his campaign to end water-borne guinea worm, a debilitating parasite infection.
PBS
Pbs Teachers: Volcanoes of the Deep
Discuss how individual organisms and groups of organisms interact with each other, and research and classify symbiotic relationships between individual organisms of different species.
BioMan Biology
Bio Man Biology: Angry Aliens: Ecology
Teach aliens about ecology as you play this game, and review your own understanding in the process. Topics covered include levels of organization, ecological relationships, nutrition and energy, cycles (water, carbon, and nitrogen), and...
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."
Biology 4 kids
Biology4 Kids: Relationships Between Organisms
Species interact every day. That interaction is a vital part of how organisms develop and change over time. When you study species, it is important to watch the way they interact with their surroundings. There are four basic types of...