Ch 3&4 Test

Which of the following would be considered a biotic factor in an ecosystem?

The 3 climate zones on Earth have been created by.....

What is the original source of almost all the energy in most ecosystems?

A symbiotic relationship in which one organism benefits and the other suffers is called

Organisms that break down dead and decaying plants and animals for food are called

Different species can share the same habitat, but competition can be reduced if they...

A grouping of organisms that are different from one another but live in the same area is called

A symbiotic relationship in which one benefits and the other isn't hurt or helped is called...

An organism's niche are...

In an energy pyramid, by how much does the flow of energy change each level?

What is the process by which bacteria convert nitrogen gas in the air into usable nitrogen?

The average year-to-year temperatures and precipitations in an ecosystem is

The photosynthetic algae at the beginning of a food chain represents...

Organisms that produce their own food from inorganic compounds are called...

What are the combined portions of the Earth called in which all living things exist?

An organism that cannot make its own food is called....

All of the members of one species that live in the same area are called a(n)

Which of the following descriptions about the organization of an ecosystem is correct?

A symbiotic relationship in which both organisms benefit is called

An interaction in which one organism CAPTURES and feeds on another is called

What animals eat both producers and consumers?

Each of the following is an abiotic factor in the environment EXCEPT..

The total amount of living tissue within a given trophic level is called the

What is an organism that feeds only on plants called?

A term used to describe environmental factors that change on a day-to-day basis is called...