Ecosystems

Ecology is best describe as the study of

• organisms interacting with nonliving things

• organisms interacting with other oraganisms

• organisms interacting with all components of their environment

• organisms interacting with humans in their ecosystem

Populations are best described as

• a group of competing species

• a group of many different species living together

• a group of nonliving organisms

• a group of the same species living together

Which is the best example of an abiotic factor?

• climate

• trees

• predators

• prey

Which is the best example of a biotic factor?

• rocks

• algae

• precipitation

• currents

Which best describes ecological levels of organization?

• Individuals makeup communities, communities makeup populations and populations along with abiotic factors compose ecosystems

• Individuals make up populations, populations make up communities and communities along with abiotic factors compose ecosystems

Which is the best description of the biosphere?

• All of the biotic components of earth

• All of the abiotic components of earth

• It is only made up of populations of earth

• It is made up of all the ecosystems of the earth

Which is the most accurate statement about biodiversity?

• biodiversity is not important in ecosystems

• the lower the biodiversity in an ecosystem, the healthier it is

• the greater the biodiversity in an ecosystem, the less healthy it is

• it refers to the variety of species in an area

Which is the best example of a density-dependent factor in an ecosystem?

• competition for resources

• energy use

• pollution

• natural disasters

Which is the best example of a density-independent factor in an ecosystem?

• predation

• weather changes

• parasitism

• disease

Which is the best description of an ecosystem?

• Includes only organisms of the same species

• All of the populations on the earth

• a community of living organisms plus their abiotic surroundings

• a population of living organisms plus their abiotic surroundings