AP Biology · Unit 8: Ecology
8.1 Responses to the Environment
In short
You must understand that organisms respond to their environment through behavioral and physiological mechanisms, and that they exchange information in response to internal and external cues. You should know that behavioral responses affect overall fitness and population success, and that communication occurs via visual, audible, tactile, electrical, and chemical signals.
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What else do you need to know about Responses to the Environment?
Fitness favors innate and learned behaviors that increase survival and reproductive success, including cooperative behaviors. However, the spec explicitly excludes several details: knowledge of specific behavioral or physiological mechanisms, knowledge of specific mechanisms of communication, and the details of various communications and community behavioral systems are all beyond the scope of the AP Exam. Illustrative examples such as phototropism, fight-or-flight, territorial marking, and pack behavior can be used to teach these concepts but are not required knowledge in themselves.
Can you do these?
- I can describe how organisms communicate through various mechanisms and how signaling behaviors can result in differential reproductive success.
- I can explain how responses to information are vital to natural selection, and how innate, learned, and cooperative behaviors increase survival and reproductive success.
How is Responses to the Environment tested on the exam?
This topic is paired with the science practice of identifying and justifying experimental procedures (Skill 3.C). You may be assessed on your ability to identify dependent and independent variables, as well as identify and justify appropriate controls, in experiments related to organism responses and communication. The primary command word used in the learning objectives is 'Explain', requiring you to articulate the 'how' and 'why' of behavioral and physiological responses.
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Responses to the Environment: common questions
What do you need to know about Responses to the Environment for AP Biology?
You must understand that organisms respond to their environment through behavioral and physiological mechanisms, and that they exchange information in response to internal and external cues. You should know that behavioral responses affect overall fitness and population success, and that communication occurs via visual, audible, tactile, electrical, and chemical signals.
How is Responses to the Environment tested on the AP Biology exam?
This topic is paired with the science practice of identifying and justifying experimental procedures (Skill 3.C). You may be assessed on your ability to identify dependent and independent variables, as well as identify and justify appropriate controls, in experiments related to organism responses and communication.
How do I know I have mastered Responses to the Environment?
Check you can do each of these: describe how organisms communicate through various mechanisms and how signaling behaviors can result in differential reproductive success; explain how responses to information are vital to natural selection, and how innate, learned, and cooperative behaviors increase survival and reproductive success.
Where does Responses to the Environment fit in AP Biology?
Responses to the Environment is topic 8.1 in Unit 8: Ecology of AP Biology.
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