Ecology

An organism that produces its own food supply from inorganic compounds is called a(an)

• heterotroph

• consumer

• detritivore

• autotroph

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

• carbohydrates

• sunlight

• water

• carbon

What is the term for each step in the transfer of energy and matter within a biological community?

• energy path

• food web

• trophic level

• food pyramid

Autotrophs make up the _______ level in all ecosystems.

• First

• Second

• Third

• Fourth

symbiotic relationship in which both organisms benefit

• competition

• Mutualism

• nitrogen fixation

• energy pyramid

which symbiosis is this 

• parasitism 

• mutualism

• commensalism

• nonalism 

A living relationship between two species in which one organism is harmed is called...

• mutualism

• commensalism

• parasitism

• niche

The image provided is an example of a(n):

• Producer

• Autotroph

• Consumer

• Insect

The amount of energy that usually transfers from one trophic level to the next...

• 10%

• 20%

• 80%

• 50%

The nonliving aspects of an ecosystem.

• Abiotic factors

• Biotic factors