Hardy-Weinberg Conditions

List the five Hardy-Weinberg conditions. Choose one and explain it using a specific example why the condition is rarely met in nature.

The Biosphere: Populations, Communities, and Ecosystems in a City

Briefly describe the three levels of organization ecologists’ use: population, community, and ecosystem. Give an example of each using a well-known city. Explain why the biosphere is considered closed and patchy. Using the ecosystem of a suburban area, explain how the following abiotic factors influence plant growth and adaptability: sunlight, water, temperature changes, soil type, and winds. How do the following affect communities: earth’s tilt, Trade Winds, prevailing winds, Gulf stream, Humboldt current, and rain shadow? How do riverine environments differ from lake/pond environments? How does temperature of a freshwater lake change with the seasons? List four ways t... click for more

Competition in ecosystems

Until the 1930’s, the dominant mammal in Louisiana marsh was the muskrat. A hurricane on Avery Island broke open several cages of nutria (a large rodent from South America), releasing them into the marsh. Now nutria have displaced the muskrat. What type of competition is this? Why are introduced species better competitors than native species?

Plant defenses against predation

Describe two plant defenses against predation. Give a specific example of each. What determines why some frogs are boldly colorful and others blend into their environment? Name two other animals that are boldly colored and why.

Types of mimicry

What are the differences between the two types of mimicry? Give an example of each.