Ecological Levels of Organization and Populations

A collection of organisms that belong to different populations but all live in the same area and interact with one another.

• Population
• Ecosystem
• Community
• Ecosphere

A collection of organisms that make up a community as well as all of the nonliving components of the environment.

• Population

• Community

• Habitat

• Ecosystem

Living factors or organisms that affect an ecosystem...

• abiotic factors

• species

• trophic level

• biotic factors

What are the biotic factors in this image?

• sunlight, elephants, grasses

• sunlight, water, oxygen

• elephants, autotrophs, food supply

• precipitation, heterotrophs, soil

What are the abiotic factors in this image?

• water, sunlight, dirt

• birds, plants, predators

• water, plants, parasites

• oxygen, water, grasses

An ecosystem contains living and nonliving things.

• True
• False

Which of the following is a population?

• hawks, barred owls, and eagles on NC coast
• mountain stream
• all the frogs in a pond
• blue-tailed skinks (lizards) around a barn

When all the ecosystems on Earth are combined it is called...

• a community.
• a biome.
• a biosphere.
• an Earthsphere.

A duck, a dragonfly, a morel mushroom and a bobcat are all examples of...

• organisms.
• populations.
• communties.
• ecosystems.

Jacob is going out to his grandparents farm. On the farm is a stream that he likes to fish at. When he is fishing he sees many differernt speacies of fish as well as maple and oak trees and dragonflies. What Jacob is seeing is an example of what level of organization?

• organism

• population

• community

• ecosystem