7th Grade: Topic 5-Populations, Communities, and Ecosystems

How an organism makes its living and interacts with the biotic and abiotic factors in its habitat

• Habitat destruction
• Genetic mutation
• Photosynthesis
• Niche

The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time

• Competition
• Harmony
• Collaboration
• Cooperation

An interaction in which one organism kills another for food or nutrients

• Competition
• Mutualism
• Photosynthesis
• Predation

Any relationship in which two species live closely together and that benefits at least one of the species

• Parasitism
• Commensalism
• Predation
• Symbiosis

A type of symbiosis between two species in which one species benefits and the other species is neither helped nor harmed

• Predation
• Parasitism
• Mutualism
• Commensalism

A type of symbiosis in which both species benefit from living together

• Mutualism
• Competition
• Commensalism
• Parasitism

A type of symbiosis in which one organism lives with, on, or in its host and harms it

• parasitism
• commensalism
• mutualism
• predation

The series of predictable changes that occur in a community over time

• Succession

• Sudden transformation
• Stable equilibrium
• Random fluctuation

The first species to populate an area during succession

• Primary species
• Starter species
• Pioneer species
• Introductory species

The number and variety of different species in an area

• monotony
• homogeneity
• uniformity
• biodiversity