Ecology

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

• carbohydrates
• sunlight
• water
• carbon

symbiotic relationship in which both organisms benefit

• competition
• Mutualism
• nitrogen fixation
• energy pyramid

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

• mutualism
• commensalism
• parasitism
• niche

What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.
• The specific ways that mutualism is carried out.
• A single pathway or energy flow between organisms. 
• How carnivores get their food. 

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

• Carnivore
• Herbivore
• Producer
• Autotroph

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%

An illustration that uses arrows to show the many possible directions in which matter and energy can pass through the organisms in an ecosystem.

• Food chain
• Food web
• Energy Pyramid
• Succession Map

The nonliving aspects of an ecosystem.

• Abiotic factors
• Biotic factors

The living portions of the ecosystem.

• Biotic factors
• Abiotic factors