How does too much fishing in an area affect its ecosystem?

organisms that eat fish could become endangered due to starvation

The fish will lay many more eggs to replace fish caught

organisms that eat the fish will become endangered

people could eat too many fish and become ill

When taken to a new habitat, non-native plants often threaten native plants of the new habitat. Why do they do this?

Non-native plants compete with native plants for resources

Non-native plants are able to mutate rapidly

Non-native plants cause native animals to relocate

Non-native plants are able to be used for medicine

How can humans best help an endangered species avoid extinction?

they can protect the animals habitat

they can put the animals in a zoo

they can take the animal to new habitats

Brown tree snakes were accidentally carried to Guam. They prey upon birds. There are no natural predators for the snakes in Guam, so which most likely happened as a result of of their arrival on Guam?

many bird populations disappeared

Immigration of new species of birds decreased

All reptile species increased in population size

The more diverse an ecosystem is --

the more threatened its populations are

the more similar the species will be

the fewer varieties of species are present

Refer to the food webs above. If the grasses in each ecosystem are attacked or killed by a disease, which ecosystem will most likely survive?

The tundra ecosystem, because there is a variety of producers

The prairie ecosystem, because fewer organisms eat grass

The prairie ecosystem, because there are fewer top predators

The tundra ecosystem, because it has more herbivores

Which statement below best describes how biodiversity contributes to the sustainability of an ecosystem?

A variety of plant and animal species allows for more survivors of a natural disaster.

Having more species in an ecosystem allows the human population to increase in size.

Low biodiversity reduces the competition for resources, which helps native species survive.

Fewer species in the ecosystem reduces the likelihood that disease spreads through the ecosystem.

How does deforestation impact the biodiversity of an ecosystem?

It decreases the number of species in the ecosystem

It increases the number of species in the ecosystem

It has no impact on the number of species in the ecosystem

It increases the number of trees in the ecosystem

What is the impact of introducing a non-native species into an ecosystem?

It decreases the biodiversity of the ecosystem

It increases the biodiversity of the ecosystem

It has no impact on the biodiversity of the ecosystem

It makes the ecosystem more sustainable

What is the effect of climate change on biodiversity in an ecosystem?

It decreases the number of species in the ecosystem

It increases the number of species in the ecosystem

It has no impact on the number of species in the ecosystem

It increases the number of trees in the ecosystem

What is the role of a keystone species in an ecosystem?

They influence the survival of many other species

They have no significant impact on the ecosystem

They only affect their own species

They decrease the biodiversity of the ecosystem

How does overhunting affect the biodiversity of an ecosystem?

It decreases the number of species in the ecosystem

It increases the number of species in the ecosystem

It has no impact on the number of species in the ecosystem

It increases the number of trees in the ecosystem

Unit 3 Populations & Biodiversity

Authored by Christina Wiley

Science

6th Grade

NGSS covered

Used 69+ times

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28 questions

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1 min • 1 pt

The largest population that an environment can support at any given time.

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1 min • 1 pt

The use of a resource.

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1 min • 1 pt

The process by which something is made worse, especially the quality of land.

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When a resource has reached the point at which it cannot regenerate itself enough to keep up with the demand.

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1 min • 1 pt

A long shortage of rainfall.

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Describes a species of animals that once lived on Earth but which no longer exists.

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Non-native organism whose population grows and dominates native plant or animal populations.

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Unit 3 Populations & Biodiversity

The largest population that an environment can support at any given time.

The use of a resource.

The process by which something is made worse, especially the quality of land.

When a resource has reached the point at which it cannot regenerate itself enough to keep up with the demand.

A long shortage of rainfall.

Describes a species of animals that once lived on Earth but which no longer exists.

Non-native organism whose population grows and dominates native plant or animal populations.

Anything that restricts the number of individuals in a population.

Too many of one type of organism in an area.

When the use of a resource is balanced by its ability to replenish itself.

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