Exam 19: Ecosystem Essentials

Which of the following is not a biotic component of an ecosystem?

A self-regulating association of living plants and animals and their nonliving physical environment is termed a(n)

The first species to colonize previously disturbed or damaged ecosystems are called a(n)

Continental drift separating a once continuous population is an example of

The environment in which an organism resides or is biologically adapted to live is called a(n)

Broadly defined,the biosphere

Only about ___ of the kilocalories in a trophic level is passed to the next trophic level (e.g. ,from autotroph to primary consumer).

Consider a simple food chain in which a grasshopper eats grass,the grasshopper is eaten by a frog,the frog is eaten by a snake,and a burying beetle feeds on the snake after it dies.Which of the following is not correctly matched?

In food webs,toxic chemicals tend to accumulate and concentrate most in the

Describe the limiting factor of an organism and how it affects this organism's distribution.

How is atmospheric nitrogen converted to a usable form in the biosphere?

When a community is disturbed to the point that most or all of its species are eliminated,a process called ____occurs in which the area undergoes a series of changes in species composition as newer communities replace older ones.

Human caused eutrophication is known as

The study of the distribution of plants and animals,the diverse spatial patterns they create,and the physical and biological processes that produce Earth's species richness is called

Energy flows through an ecosystem along an idealized unidirectional pathway called a

Which of the following would not be a limiting factor for a plant species?

Photosynthesis converts

Together,these three natural elements make up 99% of the Earth's biomass.

Photosynthesis involves

If a forest fire destroyed the vegetation in an area,but left some vestiges of the previously functioning community and the soil intact,what type of succession would follow?