This video segment from Evolution: "Evolutionary Arms Race" tells the story of the leafcutter ant and the fungus it farms -- an example of mutually beneficial symbiosis. [4:59]
Article examines the factors that drove forward the expansion of the British Empire during the nineteenth century and asks whether it was desire for trade or "thirst of conquest." Archived.
Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.
By the end of this section, you will be able to do the following:
Discuss the predator-prey cycle
Give examples of defenses against predation and herbivory
Describe the competitive exclusion principle
Give examples of symbiotic relationships between species
Describe community structure and succession
This comprehensive study guide covers the main terms and concepts needed for a unit on community ecology.
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Covers how species interact with each other.
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Covers interactions between organisms.
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Overview of symbiotic relationships.
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Discusses parasitic and mutualistic relationships of fungi.
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The evolution of eukaryotic cells and multicellular organisms.
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The evolution of eukaryotic cells and multicellular organisms.
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Describes the different roles in an ecosystem.
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This article discusses the many lichens found in the Arctic and Antarctica and their unique characteristics.
Book examines how plants communicate with animals through flower colors.
Learn about the endosymbiotic theory. This theory explains the evolution of cells from a mitochondria and chloroplast working together in a symbiotic relationship to the current cell structure.
Learn about the many types of symbiotic relationships in an ecosystem.
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Travel underground for an up-close look at the ants, amoebas, and bacteria that maintain healthy soil. Glimpse this microscopic world and learn about the symbiotic relationship between fungi and tree roots. [2:49] Support materials for students is provided.
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. Also lists several examples of insect symbiosis with some links to more in-depth descriptions.
