Organism Interactions

Cattle egrets are birds that forage in fields among cattle. The egrets get easy access to food and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism

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NGSS.MS-LS2-2

A wrasse fish feeds on the parasites found on the black sea bass's body. Both species benefit. 

• Mutualism 
• Parasitism 
• Commensalism 

Tags

NGSS.MS-LS2-2

A close, long-term relationship in which 2 different organisms live in close association with each other. 

• Carrying Capacity
• Coexistence
• Limiting Factor
• Symbiosis

The graph shows the populations for two animals that share a habitat. Foxes are mammals that hunt for food. Grouse are bird and a common prey animal of foxes. According to the data, in which year did the population of foxes show a decrease that is most likely the result of (because of) a decrease in the availability of grouse?

• 2003

• 2005

• 2008

• 2009

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

An increase in the population of an organism (living thing) could happen because of ??

• A series of severe weather events in the habitat

• A decrease in necessary resources available

• An expansion (increase) of living space

• An increase in animals that prey on the organism

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What data would be most helpful to support the claim that the population of a certain plant depends on the rainfall of the habitat?

• The average amount of water absorbed by a plant’s roots

• The amount of water the soil holds onto in the area where the plants live.

• Rainfall amounts and numbers of these plants in a certain habitat measured over several years.

• The heights and number of leaves produced by these plants under different moisture conditions

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

The milkweed plant serves an important role in the life cycle of the monarch butterfly. Adult monarchs lay their eggs in the milkweed plant, and then the monarch caterpillars eat that same plant during their development.

Based on the relationship between monarchs and milkweed, what is one reasonable prediction a scientist could make?

• If the milkweed population goes down, the monarch population will do down.

• Population of monarch butterflies should remain constant when milkweed population decreases.

• A decrease in the milkweed population would cause a monarch butterfly population increase.

• If the population of milkweeds remains constant (the same), the monarch butterfly population increases.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

The graph provides data on the populations of four organisms that share a habitat. Examine the data carefully. Based on the population changes, which two organisms are likely to depend on each other?

• Organism 1 and Organism 2

• Organism 2 and Organism 3

• Organism 3 and Organism 4

• Organism 1 and Organism 4

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-2

_____________ is a community consisting of all of the living and nonliving interactions between organisms and the environment.

• ecosystem

• population

• organism

• species

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NGSS.MS-LS2-3

The term ______________ refers to all the members of the same species in an area.

• population

• organism

• species

• community