Ecological interactions | Middle school Biology | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! Ecological interactions explain how organisms share limited resources in ecosystems. Competition, predation, herbivory, and symbioses (such as mutualism, commensalism, and parasitism) all affect survival and population size. Different strategies (such as using resources in different ways) allow many species to live together in various ecosystems. Sections: 00:00 Intro 01:15 Competition 03:14 Predation and herbivory 05:25 Symbiosis: mutualism 06:36 Symbiosis: commensalism 07:34 Symbiosis: parasitism 08:25 Ecological interactions in the African savanna ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc