Exam 12: Ecology

The tendency of toxins to accumulate in top predators is called biological ________.

The buildup of soil on bare rock by the decomposition of early colonizers is characteristic of ________ succession.

Human birth rate peaked in the 1980s and has been slowly declining ever since.How is this expected to affect our population size over the next several decades?

How might the removal of a wetland affect a nearby city?

Environmentalism is ________.

Why is an estuary considered an intermediate biome?

Which statement explains the general upwards trend of the data over the two-year time period?

Counting the number of turtle nests along a beach to determine if a recent oil spill had affected the local population is an example of ________ science.

All living things need nitrogen.How does nitrogen enter the living portion of an ecosystem?

What is the most likely expectation during the third year?

Imagine you were the manager of a national park with cheetahs.The cheetahs feed primarily on gazelles while the gazelles eat grass.It takes an acre of grassland to feed one gazelle and it takes ten gazelles to feed one cheetah.You have a maximum of ten cheetahs when the system is functioning optimally.You would like to increase the cheetah population because people pay money to see the cheetahs.How much more grassland do you need in order to double the cheetah population?

What category describes a species that,while not presently at risk of extinction,could likely be at risk of extinction in the near future?

A wolf eats a rabbit that eats grass.The wolf is a ________.

Phytoplankton is an example of a(n)________.

The responsible management (use and conservation)of the earth's resources indefinitely using science-driven policies and practices is called ________.

An age pyramid with a broad base that quickly slopes up to a narrow top would be indicative of ________.

A person may feel the need to wear a heavy jacket in the fall when the temperature first drops into the 50s.That same person may be wearing short sleeves when the temperature rises into the 50s by the end of the winter.This gradual acclimation to cold weather is a(n)________ response to changing environmental conditions.

Why do some nonnative species spread so quickly and inflict so much devastation when introduced to a new area?

A biome characterized by warm,fairly dry climate that primarily contains grasses with scattered,isolated trees is a ________.

Which theorem states that no two species competing for the exact same resources can coexist?