1 / 8

Understanding Commensalism: Biology Concepts for Students

Commensalism is one of the most challenging concepts in biology for students to grasp. It is part of symbiosis, where organisms interact closely. This lesson includes definitions and examples of mutualism, parasitism, and commensalism. For instance, mutualism occurs when both organisms benefit, like bacteria in our intestines helping us digest food. Parasitism harms one while benefiting the other, such as a tick on a dog. Commensalism involves one benefiting with no effect on the other, like clownfish and anemones. Engage students with guided practice and assessments on these relationships.

cara-ramirez
Télécharger la présentation

Understanding Commensalism: Biology Concepts for Students

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 5 minute TAKS Lessons Week of 3/3/08 *commensalism is one of the hardest words in biology for our students to understand!

  2. Symbiosis • =organisms that interact and live closely together

  3. Mutualism Both organisms benefit Example Bacteria in your intestines They get food You get the cellulose digested so you can eat plants 3 types

  4. One is harmed and one is helped Examples Tick on a dog’s ear The tick gets food (blood) The dog loses blood, gets a sore, and can get diseases Parasitism

  5. One benefits and one is neither harmed nor helped Example: Clown fish and anemones The clown fish gets protection from predators The anemone gets nothing Commensalism

  6. Guided practice • Can you think of examples of commensalism in human relationships?

  7. Assessment • Which situation best represents a mutualistic relationship? • A A tapeworm absorbing nutrients from the intestine of a dog • B An orchid being pollinated by a nectar collecting wasp • C A human losing blood to a feeding mosquito • D An armadillo rooting in the soil at the base of an oak tree

  8. Answer • B – The orchid is pollinated (and can therefore reproduce), and the wasp gets nectar for food. • All of the other answers describe parasitic relationships

More Related