NGSS.MS-LS2-1

What year is the zebra population the highest

• 1920
• 2000
• 1960
• 2020

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NGSS.MS-LS2-1

a relationship that occurs when two or more organims of the same species need the same resource at the same time

• competition
• symbiosis
• predation

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NGSS.MS-LS2-1

What happens when an environment reaches its carrying capacity?

• Populations will decrease
• Resources such as food, water, and space will be unlimited
• Populations will increase
• Nothing, everything will stay the same.

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NGSS.MS-LS2-1

The image shows an aquatic food chain. Which organism(s) will be unaffected if the krill are removed from the aquatic food web?

• A. fish

• B. penguin

• C. phytoplankton

• D. squid

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NGSS.MS-LS2-1

A plant or animal that comes into a new ecosystem and consumes limited resources are called _____________.

• Invasive Species

• Native Species

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NGSS.MS-LS2-1

What is the independent variable in this graph?

• Tadpoles

• Year

• Frogs

• Number of tadpoles in the pond

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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

This diagram shows the variety of organisms that live in different tide zones. Mussels are common organisms that compete for space in intertidal (middle) tide zones. If all of the mussels were removed from zone A, which organisms would likely compete for the space in Zone A?

• Periwinkle and Limpets

• Sea lettuce and Chiton

• Sea urchins and Hermit crabs

• Rock louse and Periwinkle

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NGSS.MS-LS2-1

The population of deer in a certain area is monitored over a period of six years. The data is represented in the graph provided. Which of the following is the most likely explanation for the change in population in 2009?

• Wild dogs, which prey on deer, were being hunted more than usual.

• Snowfall in the previous spring was higher than the yearly average.

• Humans introduced grazing animals that feed on the same plants as the deer.

• More insects that pollinate flowering plants move into the ecosystem.

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NGSS.MS-LS2-1

^{The number of individuals a habitat can sustain with the resources it has available}

• Carrying capacity

• Limiting factors

• Resources

• Population

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NGSS.MS-LS2-1