Organisms Interactions in Ecosystems

An orchid growing on the branches of tree to get more sunlight is an example of...

• Mutualism

• Commensalism

• Predation

• Parasitism

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NGSS.MS-LS1-5

What limited resource are the plants in this picture most likely competing for?

• Shelter

• Mates

• Wind

• Sunlight

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NGSS.MS-LS1-6

NGSS.MS-LS2-1

Which of the following is an interaction between 2 living organisms?

• Runoff water collecting into the ocean

• Waves washing sediment onto the beach

• Hummingbird drinking nectar from a flower

• Turtle burrowing into the sand

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NGSS.MS-LS2-2

Which of the following is an example of a living organism interacting with a non-living thing in its ecosystem?

• Turtle burrowing in the sand

• Oxpecker eats ticks off of bigger animals such as zebras

• Glaciers carving out U-shaped valleys

• Heat from the sun causing water to evaporate from the ocean

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NGSS.MS-LS2-3

Which of these describes a mutually beneficial relationship between two organisms?

• dog with worms in its intestine

• turtle and a snail that both eat grass live in a river

• honeybee pollinating a plant and receiving nectar for food

• small fish attached to a shark, eating tiny pieces of the shark's food as it floats

Which of the examples below can BEST be described as mutualism between animals?

• A tapeworm lives in the intestine of a bird and consumes the food that the bird has eaten

• Mountain lions and wolves fight each other for the same deer

• A bird eats parasites off a rhinoceros while the rhinoceros provides protection to the bird

• Rats live in the garbage dump of a town and rarely interact with people

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NGSS.MS-LS2-2

A close long term association between 2 or more species

• Mutualism

• Commensalism

• Symbiosis

• Parasitism

A tapeworm and a cat have this type of relationship.

• mutualism

• parasitism

• commensalism

• competition

This is known as a relationship in which one organism benefits, while the other is unaffected.

• Parasitism

• Mutualism

• Immigration

• Commensalism

A mosquito feeds off of the blood of different organisms. This usually causes discomfort to the organism and sometimes disease and death. This is an example of:

• Parasitism

• Decomposition

• Commensalism

• Mutualism