The Study of Life
The ability of the body to maintain stable internal conditions.
What is homeostasis?
All living and nonliving things in an area together form this.
What is an ecosystem?
Different species living and interacting in the same area form this.
What is a community?
A group of the same species living in the same area.
What is a population?
A species that is at risk of extinction.
What is an endangered species?
This step of the scientific method involves making a testable explanation.
What is a hypothesis?
An organism that produces its own food using sunlight or chemicals.
What is a producer (autotroph)?
A relationship where both species benefit.
What is mutualism?
The number of individuals per unit area.
What is population density?
This term describes the total number of different species in an ecosystem.
What is species diversity?
The group used for comparison in an experiment.
What is the control group?
The sequence of organisms that transfer energy by eating and being eaten.
What is a food chain?
The role an organism plays in its ecosystem.
What is a niche?
The maximum population size an environment can support.
What is carrying capacity?
Pollution, overharvesting, and habitat loss are all examples of this type of factor affecting biodiversity.
What are human activities (or human impacts)?
A scientific explanation supported by repeated experimentation.
What is a theory?
Only about this percentage of energy is passed to the next trophic level.
What is 10 percent?
A biome characterized by cold temperatures and permafrost.
What is the tundra?
Factors like weather or natural disasters that affect populations regardless of size.
What are density-independent factors?
A species that has an unusually large effect on its ecosystem.
What is a keystone species?
Data that are numerical and can be analyzed statistically.
What is quantitative data?
The process by which nitrogen gas is converted into usable forms by bacteria.
What is nitrogen fixation?
The type of ecological succession that occurs after a volcanic eruption.
What is primary succession?
A growth pattern that forms an S-shaped curve.
What is logistic growth?
Protecting habitats and ecosystems rather than single species is called this.
What is ecosystem conservation?