About This Chapter
GRE Biology: Behavioral Ecology - Chapter Summary
Varieties of learned behaviors are just a few of the major behavioral ecology topics covered in this chapter, which helps you prepare for similar topics you'll be asked about on the test. You'll see these topics discussed in the chapter:
- The queen/worker relationship
- Reflex and kinesis
- Habituation and imprinting
- Types of animal communication
- Circadian rhythm
- The theory of demographic transition
- Costs and benefits of altruism
- How biomedical advancement influences carrying capacity
The brief and engaging video lessons can be viewed from any location with your mobile device. Each video comes with a lesson transcript that highlights key terms in bold to give you a thorough and effective review. After you are done reviewing a lesson, you can take a quick self-assessment quiz to gauge your understanding.
GRE Biology Objectives
The behavioral ecology area on the GRE Biology subject test is one of the five parts that make up the entire ecology section. The test has 190 multiple-choice questions and about 17% of them are ecology questions. The optional GRE Biology test demonstrates your mastery of biology topics and can be included in your application packet when you apply for graduate school.
1. Innate Behavior: Reflexes, Kineses and Taxes
When there is a loud sound, you quickly jump without thinking. This is because this reflex is an innate, or inherited, behavior. In this lesson, we will look at reflexes as well as several other types of innate behaviors.
2. Learned Behavior: Imprinting, Habituation and Conditioning
Ever wonder why it is easier to train your dog when you give him a treat every time he does something correct? In this lesson we will take a look at conditioning as well as several other forms of learned behavior.
3. Social Behavior: The Cost-Benefit of Altruism and Kin Selection
Ever wonder why people are more likely to help their relatives than complete strangers? Social behavior can help explain this and other actions. Let's look at the cost of certain behaviors.
4. Social Behavior: Agonistic, Dominance Hierarchies, & Territoriality
Instead of using words, animals communicate with each other through social behaviors. These actions between individuals may be used to establish rank, defend home and breeding sites, and compete for resources.
5. Social Systems vs. Individual Fitness: The Queen/Worker Relationship
The queen bee rules her hive while others take care of her needs. This form of behavior may seem odd, but it can be explained by looking into social systems and fitness.
6. The Theory of Demographic Transition: Overview
Populations change over time. The growth or decline of a population can have an effect on the quality of life for people within that population. In this lesson, you'll learn about the theory of demographic transition, which is a model used to study and predict population changes.
7. Carrying Capacity of a Population: Effect of Biomedical Progress
The human population continues to grow. There are several things that contribute to this growth, including biomedical progress. In this lesson, we will look at some examples as well as what may happen if this growth continues.
8. The Circadian Rhythm
You wake up in the morning and go to sleep at night. But some animals do the opposite: wake at night and sleep during the day. What determines the time of day you're active is your circadian rhythm, an internal clock that keeps daily time for you.
9. How Animals Communicate: Chemical, Visual & Electrical Signals
Animals use a variety of different signals to communicate with each other. In this lesson you'll identify the different types of communication signals and the situations in which they might be most useful.
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