Ecology

Green plants are

• producers
• consumers
• herbivores
• omnivores

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

• carbohydrates
• sunlight
• water
• carbon

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

• heterotroph
• consumer
• detritivore
• autotroph

What is an ecological model of the relationships that form a network of complex interactions among organisms in a community from producers to decomposers?

• food web
• an ecosystem
• food chain
• a population

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

which symbiosis is this 

• parasitism 
• mutualism
• commensalism
• nonalism 

symbiotic relationship in which both organisms benefit

• competition
• Mutualism
• nitrogen fixation
• energy pyramid

The energy at each trophic level in the pryamid of energy decreases by a factor of ____.

• 10
• 1
• 100
• 2

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

• Carnivore
• Herbivore
• Producer
• Autotroph