Describe the regulation of circadian rhythm in humans.

1. Describe the regulation of circadian rhythm in humans. • List three stimuli that can trigger migration. Give two examples of organisms that migrate. • List three clues that can be used by animals as compass during migration. • List three ways that animals can use to communicate. Give an example of an animal that uses each. • Name two reasons why timing of events is significant for animals.

2. Explain how the concept of limiting factors applies to population biology. • Differentiate between logistic and exponential growth. • A population started with 200 individuals. Over the following year the following occurred: • Birth = 35 Birth rate: __________ • Death = 17 Death rate: __________ • Net migration = - 5 Net migration rate: ________ • Rate of population change: ____________

3. Explain why many K-selected species tend to predominate in stable, climax communities. • List three types of interspecific relationships. Give an example of each. • Give examples of two adaptations of predators and two of prey organisms that make them more successful. • What is coevolution? How would that apply to the evolution of viruses and their host? • Approximately, how many kilograms of carnivore production can be supported by a field plot containing 2,000 kg of plant material?

4. Explain the causes, consequences and potential solutions of CO2 increase in the atmosphere. • Explain the causes, consequences and potential solutions of eutrophication. • Explain what biomagnification is. How does it affect organisms on the various levels of food chains. • Explain the effects, consequences and potential solutions to decreased biodiversity.

5. On half of a big paper, draw out the flow of energy in the ecosystem (include GPP, NPP, consumers, decomposers, detritus, cellular respiration and fossilization) • On the second half of a big paper, draw out the carbon cycle, the nitrogen cycle, the water cycle and the phosphorous cycle.