Exam 23: Ecosystems and Populations

Factors in the environment that limit the ability of a species to meet its biotic potential are known as ________ factors.

-The figure above shows an ecological pyramid. Which level of this pyramid contains the primary producers?

If an owl is moved from a mature evergreen forest to a mature hedgerow in a suburban neighborhood, the owl's ________ has been changed.

The process by which some bacteria convert nitrate to atmospheric nitrogen gas is called ________.

Human population begin to rise rapidly following the

During photosynthesis, high energy carbohydrates are produced during the ________.

The point at which the number of births equals the number of deaths is called ________.

During a murder investigation in your hometown, the crime scene investigation unit has discovered blow fly maggots developing on the body. As an amateur detective, you arrive on the scene just in time to explain to the investigators how the flies are serving as decomposers and carnivores at the same time. How is this possible?

Unlike the carbon and nitrogen cycles, the phosphorous cycle is classified as a(n) ________ cycle because phosphorus never enters the atmosphere.

Which one of the following is most likely to feed on detritus?

The ________ is an organism's role in its community.

Slow weathering of sedimentary rock makes "new" ________ available in the exchange pool found in soil.

Once populations exceed the carrying capacity of the environment, environmental resistance increases.

Under natural conditions, the amount of nitrogen gas returned to the atmosphere by denitrification approximately balances

Excess sugar produced by plants is stored in the form of ________ in cells of their seeds, fruits, or roots.

For bacteria living in benthic regions of a lake, exponential growth could continue even if the carrying capacity of the environment was exceeded provided nutrients were unlimited.

A progression of population changes that are tied to a region's industrial development and the economic well-being of its citizens is referred to as

All of the red squirrels living on a college campus would be a(n)

Disease outbreak occurring over a wide geographic area and affecting a large portion of the population is referred to as

In a graphical representation of an organism's population growth in a given habitat, the growth rate for an organism whose population is increasing according to its biotic potential is best represented by a(n)