Exam 12: Ecology

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

Which of the following examples of adaptation fall into the same category of either anatomical,behavioral,or physiological response to environmental conditions?

"Ecology" is best defined as the study of ________.

All ecosystems need energy.What is the originating source for most of the energy that powers ecosystems on this planet?

The processes of chemical cycling would be studied mainly by ________.

What type of species,if removed from the community,could lead to the collapse of the entire community?

There have been several mass extinctions in the planet's history,such as the extinction of the dinosaurs,but the current mass extinction is different.Greater numbers of species are now going extinct faster than ever before.Also unique to the current mass extinction is the cause.What is causing the current mass extinction?

Disturbances to an ecosystem,such as fires and floods,are often seen as negative.Describe a situation where regular disturbances are not only beneficial,but are required to sustain the ecosystem.

Which month was the wettest? (Remember that the readings are taken at the first of each month.)

How does an increase in atmospheric greenhouse gases increase global temperatures?

Of the biomes listed,which is best adapted to seasonal fires?

Using sunflower plants to naturally remove heavy toxins from contaminated soil is an example of ________.

A dispersion pattern refers to ________.

Species diversity is highest when ________.

What is the term used to describe relatively small areas with unusually high concentrations of species found there and nowhere else,including many species in high risk of extinction? These areas receive the focus of global conservation efforts.

An ecosystem is a collection of all the ________ in a given area.