Chapter 7 / Study Guide

An organism's particular role in its habitat, or when and how it survives, is called it's

• Carrying capacity

• ecosystem

• competition

• niche

If all members of a species disappear from Earth, the species is said to be

• Extinct

• Endangered

• Threatened

• Keystone

A former farmland that is now home to shrubs and small trees is undergoing

• Pioneer Succession

• Primary Succession

• Secondary Succession

• Adaptive Succession

The water cycle, photosynthesis, nutrient cycle and soil formation are all examples of

• Cultural Services

• Provisioning Services

• Regulating Services

• Supporting Services

The behaviors and physical characteristics of species that allow them to live successfully in their environment are called

• Habitats

• Limiting Factors

• Biotic Factors

• Adaptations

The first species to populate an area where primary succession is taking place are called

• Pioneer Species

• Primary Species

• Secondary Species

• Succession Species

Resources that are consumed from an ecosystem are a

• Economic Value

• Ecological Value

• Indirect Value

• Direct Value

The series of changes that occurs after a disturbance in an existing ecosystem is called

• Primary Succession

• Secondary Succession

• Disturbance Succession

• Pioneer Succession

What percentage of all organisms that have ever lived on Earth are now extinct?

• 20%

• 90%

• 70%

• 60%

Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce?

• Natural Selection

• Overproduction

• Competition

• Variation