NGSS.MS-LS2-1

Which two organisms in this food web are COMPETING for food with each other?

• Cougar and Deer
• Rabbit and Snake
• Insects and Grass
• Shrew and Mouse

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NGSS.MS-LS2-1

Brown trout consume (eat) more tadpoles when the fly larvae reduce in number (decrease).  This proves...

• The dependence of organisms and biodiversity in an ecosystem
• Diversity increases as organisms decrease
• Losing an animal is good for ecosystems
• Changes in ecosystems create new organisms

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NGSS.MS-LS2-1

There are 3 species of birds on an island. Bird A has a heavy bill for eating big seeds and. Bird B has a sharply pointed bill for eating insects. Bird C has a sharp bill for eating insects and small seeds. If the insect population suddenly disappeared one season, which bird or birds would probably be least affected that season?

• Bird A
• Bird B
• Bird C
• Bird A and Bird B

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NGSS.MS-LS2-1

What factor would cause animals of the same species to begin competing with one another?

• increase in precipitation         
• the presence of decomposers
• the introduction of a new food source
• limited supply of resources

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NGSS.MS-LS2-1

What will happen if a factor that a species is dependent on decreases?

• The species will also decrease

• The species will increase

• nothing

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NGSS.MS-LS2-1

Scientists gathered the following data on lizard populations for several years. The results are shown in the table. Which environmental factor most likely contributes to the change in lizard population? 

• increase in available water and food
• increase in shelter
• increase in predators
• increase in light

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NGSS.MS-LS2-1

This graph shows....

• when the biotic factor increases the population increases immediately.

• the biotic factor constantly decreasing.

• the abiotic factor constantly increasing

• There is a delay of several months for the population to increase following an increase in the abiotic factor.

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NGSS.MS-LS2-1

Two or more organisms seeking resources at the same time is

• population

• intraspecific competition

• ecosystem

• organism

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NGSS.MS-LS2-1

When there is a lack of resources such as food, water, space, and sunlight, this is often called a

• limiting factor

• big hot mess

• healthy ecosystem

• population grower

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NGSS.MS-LS2-1

Carrying Capacity is the largest population an ecosystem can support. What is the carrying capacity of the species shown in this graph?

• 2000

• 100

• 200

• 50

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NGSS.MS-LS2-1