Week 5 Review

Which of these subjects is MOST LIKELY to be studied in ecology?

• the method of water transport in a tree

• a comparison of muscle cells among birds & reptiles

• the circulatory system of earthworms

• the interaction between populations of wolves and deer

List the following terms in order from smallest to largest: individual, community, ecosystem, population, biosphere, biome

• individual, population, community, ecosystem, biome, biosphere

• individual, community, population, ecosystem, biosphere, biome

• community, individual, population, ecosystem, biome, biosphere

• population, individual, community, ecosystem, biome, biosphere

Is air an abiotic or biotic factor?

• Abiotic

• Biotic

Are predators and disease density independent or dependent factors?

• Independent

• Dependent

A population of mountain lions lives in an alpine forest. They hunt deer, rabbits, and other prey. As the mountain lion population increases, which of these events is most likely to occur?

• Female mountain lions raise an increasing number of pups per litter, and a greater percentage of pups survive to adulthood.

• Competition for territory and other resources acts to slow the growth rate of the population.

• A wildfire, drought, or other natural disaster acts to decrease the mountain lion population by at least 50 percent.

• A decrease in competition acts to increase the growth rate of the population.

Woodpeckers peck trees to find food and make nests. What would happen if most of the trees are cut down?

• The woodpecker populations will raise more young per year.

• The woodpecker populations will lack adequate resources and will decrease.

• The woodpecker populations will experience greater immigration.

• The woodpecker populations will use new food sources and nesting sites.

The flea population on a rat is monitored for 5 weeks after adding flea powder. What type of growth curve is being demonstrated? (Note: Flea powder kills fleas!)

• Exponential Growth Curve

• Logistic Growth Curve

A lucky yeast cell falls into your glass of grape juice and reproduces for 10 hours. What type of growth curve is being demonstrated?

• Exponential Growth Curve

• Logistic Growth Curve

Which of the following statements is true of Earth’s carrying capacity?

• It is infinitely expandable.

• It grows larger as the population increases.

• It was reached in the last century.

• It has been increased by technology.

How do invasive species disrupt ecosystems?

• by crowding out native species

• by becoming an essential food source

• by causing habitat fragmentation

• by decreasing competition