A certain desert has very high temperatures, low precipitation, sparse vegetation and little available food. This statement best describes

the limiting factors that species face in the desert

the carrying capacity of the desert

only abiotic factors in the desert

all the biotic factors in the desert

A certain forest can support a population of 300 squirrels. This statement best describes

the carrying capacity of the forest for squirrels

the limiting factors that squirrels face in the forest

the tolerance of squirrels for changes to their environment

the predator-prey relationship of squirrels and foxes

Why is it important to conserve the biodiversity of Earth?

to increase the stability of ecosystems during environmental changes

to decrease the amount of global predator populations

to decrease the stability of major global ocean currents

to increase the amount of nonrenewable resources located in the lithosphere

DDT and other pesticides used over 50 years ago are still affecting the environment today. Scientists have found these substances in recent glacier runoff. Glacier runoff occurs during the summer, when precipitation that has fallen on glaciers during the winter is released. Ice layers from existing glaciers have been analyzed. The results of this analysis show that the concentrations of DDT and other pesticides were highest about 10 years after the use of these substances was banned. This information shows that

the decision of one human generation may have an impact on future generations.

DDT and other pesticides cause glacier runoff during the summer.

it takes humans over 50 years to analyze a glacier.

precipitation helps to break down pesticides.

The northern elephant seal was almost hunted to extinction in the 1800s. By the late 1890s, approximately one hundred seals were left, reducing the gene pool of the population. What will be the consequence of this reduction?

The elephant seals will be more vulnerable to environmental change.

Competition within the population will increase.

The surviving elephant seals will be better able to adapt.

Inbreeding will be less frequent among the remaining population.

A community is concerned about the water quality of a nearby lake. Increased sedimentation in the lake is endangering the native habitat. The increased sedimentation is most likely caused by which of the following?

construction of homes along the lake

trees planted along the shore of the lake

the amount of sunlight on the lake

When fertilizers run off farmland into streams and ponds, the nitrogen content of the water increases. This can lead to rapid growth of algae in a process called eutrophication. How can this process affect other organisms in the water?

Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.

The water becomes better able to support aerobic organisms.

The algae provide food for fishes and other organisms, leading to decreased algae populations.

The extra nitrogen provides additional food for the other organisms, increasing their population.

Whaling was a very profitable profession until whale populations crashed. The global community came together to enact a ban on whaling. However, Japan and Norway have not agreed to stop whaling. Which of the following is the most likely consequence of their decision?

The whale populations are not rebounding as quickly as they might if all of the countries agreed not to hunt whales.

The whale populations are bouncing back very successfully and are unaffected by Japan and Norway continuing to whale.

The whale populations have mutated into new kinds of organisms.

The whales are getting better at avoiding capture.

Acacia trees and acacia ants maintain a mutualistic relationship. Which best explains what would happen to the trees and ant populations if a disease that affects acacia trees is introduced into the ecosystem?

Both populations will decrease.

Both populations will increase.

The tree population will decrease, but the ant population will increase.

The tree population will decrease, but the ant population will remain the same.

The graph below shows the relationship between available space in an ecosystem and a population of rabbits. How would the rabbit population be affected if land was cleared to build a housing development?

The rabbit population would decrease.

The rabbit population would increase.

The rabbit population would remain stable.

The rabbit population would rise temporarily, then fall.

The chart below shows the human population and the fox population in an area. Which best explains the relationship between the human and fox populations in the ecosystem?

Humans compete for the same space as foxes, causing the fox population to drop.

Humans compete for the same prey as foxes, causing the fox population to drop.

Humans are affected by the same D. diseases as foxes, causing both populations to change in the same way.

Humans are affected by the same predators as foxes, causing both populations to change in the same way.

If krill is a primary food source for a local population of whales, which will most likely happen to the whales if the krill population suddenly doubles?

The whale will increase in number.

The whales will have to compete more with each other for available food.

The whales will have to find another food source or risk starvation.

The whales will migrate to another area.

The diagram below shows a forest food web. If deer were introduced into this ecosystem, which would most likely occur first?

The grass population would decrease.

The beetle population would decrease.

The robin population would decrease.

The snake population would decrease.

When a population grows past the ecosystem's carrying capacity, what happens to the population?

The population starts to die off to return to carrying capcity

The population will go extinct due to lack of resources

The population grows then finds a new carrying capacity

What do the arrows in a food web represent?

The direction of travel of each organism

The arrow points to the animal being eaten

What is an example of natural selection?

If the climate gets colder, animals that have thicker coats are more likely to reproduce

Humans like animals with floppy ears, so they only breed dogs with floppy ears

A peacock's tail is extravagant to attract a mate

Humans bringing each other flowers to make friends

What is an adaptation in Ecology?

A difference that gives one organism a better chance of survival

The differences between organisms in a population

When they take a book and make it into a movie

When an organism changes from one thing to another

How do biodiversity and sustainability work together?

The higher the biodiversity, the greater the sustainability.

The lower the biodiversity the greater the sustainability.

The higher the biodiversity, the less sustainable the ecosystem

Biodiversity has nothing to do with sustainability.

having a lot of variety of different organisms.

having a lot of the same organism.

having a few of the same organism.

only having one of each organism.

Biodiversity is important to keep an area (biome) healthy. In this example "Food Web A" is sustainable. Why is sustainability important for an ecosystem in "Food Web A".

If one organism is removed the food web can still operate (work) with little or no negative effect.

If an organism is removed the food web will collapse and will affect the environment.

Why are advantageous traits more likely to be passed onto offspring?

Because they are more likely to survive and reproduce.

Because they come from dominant alleles.

Because they come from recessive alleles.

Because the trait is an acquired phenotype.

Ecology

Authored by Kristen Rush

Biology

8th Grade

NGSS covered

Used 36+ times

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MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the original source of almost all energy in most ecosystems?

carbohydrates

sunlight

water

carbon

Tags

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Water temperature would be an example of ...

A biotic factor

An abiotic factor

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A collection of organisms that belong to different populations but all live in the same area and interact with one another.

Population

Ecosystem

Community

Ecosphere

Tags

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Organisms that feed on both living producers and other consumers.

Carnivores

Omnivores

Herbivores

Detritivores

Tags

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Examples of a producer

frog

algae

worm

mouse

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A localized group of organisms that belong to the same species is called a

community

population

ecosystem

family

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A cow's herbivorous diet indicates that it is a(n)

autotroph

decomposer

secondary consumer

primary consumer

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Ecology

What is the original source of almost all energy in most ecosystems?

Water temperature would be an example of ...

A collection of organisms that belong to different populations but all live in the same area and interact with one another.

Organisms that feed on both living producers and other consumers.

Examples of a producer

A localized group of organisms that belong to the same species is called a

A cow's herbivorous diet indicates that it is a(n)

Which of the following terms encompasses (includes) all of the others?

The number of organisms of a particular species that an environment can support is called

A certain desert has very high temperatures, low precipitation, sparse vegetation and little available food. This statement best describes

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