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

• 10%
• 20%
• 80%
• 50%

Water temperature would be an example of ...

• A biotic factor
• An abiotic factor

A collection of organisms that belong to different populations but all live in the same area and interact with one another.

• Population
• Ecosystem
• Community
• Ecosphere

A place where an organism lives.

• Terrain
• Habitat
• Community
• Population

All of the living and nonliving things in an area that interact with each other are called a/an ______.

• community
• habitat
• population
• ecosystem

Consumer that eats plants

• heterotroph
• herbivore
• producer
• community