Communities and Interactions

Tiny organisms called mites live in human eyelashes and feed on dead skin, without harming humans

• mutualism

• commensalism

• parasitism

Certain bacteria live in human intestines, where they get food and also help humans break down their food.

• mutualism

• commensalism

• parasitism

Tags

NGSS.MS-LS2-2

A symbiotic relationship in which one organism benefits and another is harmed.

• symbiosis

• mutualism

• commensalism

• parasitism

Fleas and ticks on a dog

• mutualism

• commensalism

• parasitism

Define biotic factor.

• an environmental factor that is associated with or results from the activities of living organisms

• an environmental factor that is not associated with the activities of living organisms (non-living)

Tags

NGSS.MS-LS1-4

NGSS.MS-LS2-4

the role of a species in its community, including use of its habitat and its relationships with other species

• mutualism

• competition

• niche

An ecosystem is best described as the interaction of

• None of the biotic and abiotic factors of a given area

• Some of the biotic and abiotic factors of a given area

• All of the biotic and abiotic factors of a given area

Tags

NGSS.MS-LS2-3

Grass is eaten by a prairie dog. The prairie dog is eaten by a coyote. This is an example of

• a) an abiotic element.

• c) a herbivore.

• b) an omnivore.

• ) a food chain.

Tags

NGSS.MS-LS2-3

Young wasps are eating the tomato hornworm that is their host. What is this an example of?

• Commensalism

• Mutualism

• Parasitism

• Competition

A tick sucks blood from a dog. In this relationship, the tick is the ................. and the dog is the .................

• parasite, prey

• predator, host

• parasite, host

• host, parasite