Levels of ecological organization in an ecosystem

A single living thing

• organism

• niche

• biotic factors

• abiotic factors

The interaction of biotic and abiotic factors with a given area

• habitat

• ecosystem

• community

• biotic factors

A grassland experiences a drought. What is most likely to occur?

• Populations of predators would increase because they do not rely on plants for food.

• Populations that make up the grassland ecosystem will move away or die.

• Grasses thrive in dry conditions, so their population would increase.

• Plants will die, but animals would not be affected.

All the members of the same species in a specific arrea

• community

• biome

• population

• ecosystem

Which of the following answer choices is an example of biotic and abiotic factors interacting in an ecosystem?

• Two lions resting in the same area

• A deer and a giraffe drinking water from a river

• An alligator walking around on the beach

• A sea gull flying through a tropical rainforest

Which of the following is not an example of parasitism?

• ticks on a dog

• barnacles on a whale

• fleas on a cat

• heartworms in a dog

Organisms living together with another organism in close association

• commensalism

• mutualism

• symbiosis

• parasitism

The study of the interactions or organisms with one another and their environment.

• ecology

• ecosystem

• community

• population

Temperature, soil, water are examples of

• biotic factors

• abiotic factors

• ecosystem

• habitat

Organisms both benefit from the association is called

• parasitism

• commensalism

• community

• mutualism