Ecosystems

Ecology is best described as the study of

• organisms interacting with nonliving things
• Organisms interacting with other organisms
• Organisms interacting with all components of their environment
• Organisms interacting with humans in their environment

Population is best described as

• A group of competing species
• A group of many different species
• A group of nonliving organisms
• A group of the same species living together

Which is the best example of an abiotice factor in an ecosystem?

• Climate
• Trees
• predators
• Prey

Which is the best example of a biotic factor in an ecosystem?

• Rocks
• Algae
• Precipitation
• Currents

Which best describes ecological levels of organization?

• Individuals make up communities, communities make up populations and populations along with abiotic factors compose ecosystems
• Individuals make up populations, populations make up communities and communities along with abiotic factors compose of ecosystems.
• Ecosystems make up populations, populaitons make up communities and communities along with abiotic factors compose the biosphere
• Individuals make up communities, communities make up ecosystems and ecosystems along with abiotic factors compose of biosphere.

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 on Earth
• It is made up of all the ecosystems on 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 density-dependent factor in an ecosystem?

• competition for resources
• energy use
• population
• 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