Ecology

Ecology is the study of how organisms interact with one another and with environments.

• True
• False

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

• carbohydrates
• water
• sunlight
• carbon

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

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

symbiotic relationship in which both organisms benefit

• Mutualism
• competition
• 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?

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

The nonliving aspects of an ecosystem.

• Biotic factors
• Abiotic factors

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

• Population
• Ecosystem
• Ecosphere
• Community

A collection of organisms that make up a community as well as all of the nonliving aspects of the environment.

• Population
• Community
• Ecosystem
• Habitat

A niche is the role or job the population has in the ecosystem. 

• True
• False