Interdependence of Living Systems

When the hare population increases, what happened to the lynx population?

• It rose. 

• It fell. 

• It stayed the same.

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Which organism do the owl and the weasel compete for in the food web?

• Hawk

• Spider

• Grasshopper

• Shrew

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This graph demonstrates--

• there is no relationship between predator and prey populations.

• changes in the predator population depend on changes in the prey population.

• Predator and prey populations are constantly increasing.

• changes in the prey population depend on changes in the predator population.

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In an ocean ecosystem, which biotic factors would effect a population of fish negatively? 

• Too cold of temperatures 

• Too many large predators 

• Too much water 

• Too many prey 

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Which of the following is NOT a type of symbiotic relationship?

• Mutualism

• Commensalism

• Parasitism

• Predation

Answer explanation

Predation is not a type of symbiotic relationship because it involves one organism consuming another, unlike mutualism, commensalism, and parasitism which involve interactions between different species.

Which of the following best describes a symbiotic relationship?

• A relationship where both species compete for the same resources.

• A relationship where one species benefits and the other is unaffected.

• A relationship where both species benefit from each other.

• A relationship where one species benefits at the expense of the other.

Answer explanation

A symbiotic relationship is where both species benefit from each other, making it the best description among the options provided.

What is the main difference between mutualism and commensalism?

• Mutualism benefits both species, while commensalism benefits one and harms the other.

• Mutualism benefits both species, while commensalism benefits one and does not affect the other.

• Mutualism benefits one species and harms the other, while commensalism benefits both.

• There is no significant difference; they are the same.

Answer explanation

The main difference between mutualism and commensalism is that mutualism benefits both species, while commensalism benefits one species and does not affect the other.

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A food web diagram is provided. Which of the following represents a predator/prey relationship illustrated by the food web diagram?

• The deer obtains energy by eating leaves from trees.

• The grass obtains energy from the Sun.

• The hawk obtains energy by eating the snake

• The rabbit obtains energy by eating the grass.

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A desert food web is shown in the diagram. Which of the following represents a producer/consumer relationship that is illustrated in the diagram?

• Fire ants get energy from plants.  

• Hawks get energy from kangaroo rats.

• Rattlesnakes get energy from spiny lizards.

• Scorpions get energy from fire ants.

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Which two organisms are in a PREDATOR-PREY relationship?

• Grass and Vole

• Gray wolf and Elk

• Vole and Elk

• Gray Wolf  and Fruits

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