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Chapter 37: 11-21

Course Materials are always under revision! Weblecture content may change anytime prior to two weeks before scheduled chat session for content.

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Biology Homework Chapter 35: Social Behavior


Reading Preparation

Textbook Assignment: Chapter 37: Ecological Structures, sections 14-21.

Study Points

Web Lecture

Read the following weblecture before chat: Ecosystems

Take notes on any questions you have, and be prepared to discuss the lecture in chat.

Study Activity

Perform the study activity below:

Use the Nitrogen Cycle activity at the PBS learning site to explore how nitrogen cycles through the environment.

  • Click on the launch button and read the short introduction.
  • Click on the STEP (right) button to step through the animation.
  • How does N2 move from the atmosphere to living organisms?
  • What is nitrogen fixation? What organisms are needed to make this happen?
  • What is ammonification? What organisms are needed to make this happen?
  • What is nitrification? What organisms are needed to make this happen?
  • How does nitrogen return to the atmosphere?

Chat Preparation Activities

Chapter Quiz

Lab Work

Read through the lab for this week; bring questions to chat on any aspect of the lab, whether you intend not perform it or not. If you decide to perform the lab, be sure to submit your report by the posted due date.