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9.2: Using Species Interactions – Student Edition (Human Biology)

Difficulty Level: At Grade Created by: CK-12

Begin by discussing the main question posed at the beginning of the section, “How do different species affect one another?” To emphasize the variety of interactions, ask students to list specific examples of interactions that they have observed between different species.

When students read their examples, ask them to categorize the interactions as either Win/Lose (such as competition for food and/or habitat, predator/prey, or parasite/host) or Win/Win (such as mutualism).

Assign Mini Activity: How Do I Interact with Other Species? as an opportunity for students to think about their interaction with other species.

Ask students to complete What Do You Think? on page 48 as a follow-up to Mini Activity: How Do I Interact with Other Species?

Assign Activity 8-1: Once Upon an Oak Tree. Students can examine why interactions occur between organisms, and they can assess whether those interactions are helpful or harmful.

Highlight the graph in Figure 8.4 to illustrate the interdependent relationship between predators and prey.

How Do I Interact with Other Species? Students develop a list of ten ways that they interact with organisms in their local environment, then proceed to list ten ways that they interact with other organisms on a global level.

What Do You Think?

Humans are usually pretty good at competing with other species for resources. Does this mean that humans have a right to use any resources they can get in any way that they think fit? Explain your answer.

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