Biology 3.1 - What is Ecology

All of life on Earth exists in a region known as

• an ecosystem.
• a biome.
• the biosphere.
• ecology.

Groups of different species that live together in a defined area make up a(an)

• population.
• community.
• ecosystem.
• biosphere.

What is the definition of ecology?

• The scientific study of interactions among organisms and between organisms and their environment.
• The scientific study of human populations.
• The scientific study of composition, structure, properties and change of matter.
• The scientific study of processes that produced the diversity of life on Earth starting from a single origin of life.

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How do scientists use modeling to study ecological changes?

• Scientists use models to gain insight into ecological changes that are too complex or too long-range to study directly. 
• Scientists use models to gain insight into scientific study of human populations.
• Scientists use models to gain insight into the composition, structure, properties and change of matter.
• Scientists use models to gain insight into the processes that produced the diversity of life on Earth starting from a single origin of life.

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A group of individuals belonging to a single species that live together in a defined area is termed a(an)

• population.
• ecosystem.
• community.
• biome.

The level of ecology that contains the combined portions of the planet in which all life exists, including land, water, and air or atmosphere. 

• biosphere.
• ecosystem.
• community.
• biome.

The level of ecology that contains a group of organisms so similar to one another that they can breed and produce fertile offspring. 

• species.
• individual.
• population.
• community.

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The level of ecology that focuses on the assemblage of different populations that live together in a defined area.

• species.
• individual.
• population.
• community.

The level of ecology that focuses on a collection of all the organisms that live in a particular place, together with their nonliving environment. 

• biosphere.
• biome.
• ecosystem.
• community.

The level of ecology that focuses on a group of ecosystems that have the same climate and similar dominant communities.

• biosphere.
• biome.
• ecosystem.
• community.