Symbiotic Relationships
Grade 7 · Science · Ecology · Quebec, Canada
Lesson Summary
Explore the different ways species live closely together: mutualism, commensalism, and parasitism.
Explanation
Symbiosis is a close, long-term relationship between two different species. In mutualism, both species benefit—like bees pollinating flowers while collecting nectar. In commensalism, one species benefits while the other is unaffected—like a bird nesting in a tree. In parasitism, one species (the parasite) benefits at the expense of the other (the host)—like a tick feeding on a dog. Recognizing these relationships helps you understand how species depend on each other.
Practice Questions
Q1: A clownfish lives in a sea anemone. The anemone protects the clownfish, and the clownfish brings food to the anemone. What type of symbiosis is this?
Answer: Mutualism, because both the clownfish and the sea anemone benefit from the relationship.
Q2: A tapeworm lives inside a human's intestines and absorbs nutrients. What type of symbiosis is this?
Answer: Parasitism, because the tapeworm benefits while the human is harmed by losing nutrients.
Q3: Barnacles attach to a whale's skin. The barnacles get transportation to food-rich waters, and the whale is not affected. What type of symbiosis is this?
Answer: Commensalism, because the barnacles benefit while the whale is neither helped nor harmed.
People Also Ask
What is Symbiotic Relationships in Grade 7 Science?+
Symbiotic Relationships is a lesson in the Ecology chapter of Grade 7 Science. It is part of the Quebec, Canada school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Symbiotic Relationships?+
Symbiotic Relationships is taught in Grade 7 as part of the Science curriculum in Quebec, Canada.
How can I help my child with Ecology in Science?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Ecology topics.