1. How do organisms respond to changes in their environment?

2.  What is a stimulus?

3.  What is a signaling behavior and what does it produce?

4.  List five types of communication mechanisms used in animals.

5.  List four uses of these communication mechanisms.

6.  Natural selection favors the behaviors that increase  _________________  and __________________  _____________________

7.  Explain the difference between innate and learned behavior.

8.  What is a cooperative behavior? Why do organisms use cooperative behaviors?

9.  What is aposematism? Give two examples.

10.  How do mammals establish territories?

1.  How do endotherms maintain body temperature?

2.  How do ectotherms maintain body temperature?

3.  What is metabolic rate?

4.  What is the relationship between metabolic rate and the size of the organism?

5.  A net gain in energy can result in __________________ or _______________; a net loss in energy can result in __________________  or ______________

6.  Organisms that produce many offspring at a time (r-selected) are _________  energy-efficient and tend to be in ________________  environments.

7.  Organisms that produce few offspring at a time (K-selected) are ____________ energy-efficient and tend to be in _________________ environment.

8.  Changes in energy availability can results in changes in ________________ size

9.  What is a trophic level?

10. What do food chains show?

11. What is a food web?

12. Population size ________________ as you go up trophic levels.

13. Explain the differences between the two types of autotrophs.

14. Where to heterotrophs get energy?

1.  What is a population?

2.  The size of a population largely depends on _________________

3.  How does food availability affect reproduction and survival rates?

4.  What are some adaptations that aid in survival when energy availability decreases?

5.  List some factors that affect population growth.

6.  If B > D the population growth rate will ______________, if B < D the population growth rate will __________________

7.  What conditions lead to exponential growth?

8.  What would a graph of the population size in a population experiencing exponential growth look like?

9.  What would a graph of the population size in a population experiencing logistic growth look like?

10. Stop the video at 3:04. What is the growth rate of the population in the question? Show your work.

1.  What is population density?

2.  How does food availability affect population density?

3.  What are density dependent factors. Give two examples.

4.  What are density independent factors. Give two examples.

5.  What are the three stages of growth shown in the logistic growth curve?

6.  What would a graph of population size in a population experiencing logistic growth look like?

7.  What is carrying capacity?

8.  What causes a population to reach carrying capacity?

9. Write the equation for logistic growth here. How does dN/dt change as N gets closer to K?

10. Stop the video at 3:18. What is rmax? Show your work.