What happens to an ecosystem when a keystone species is removed?

Loss of a keystone species has a large impact and the stability of ecosystem is in jeopardy

Loss of a keystone species has no impact.

Loss of a keystone species has little impact.

The blending of two species to one

Parallel evolution of two species

Which traits get passed on from generation to generation?

The traits best suited for the current environment

The traits least suited for the current environment

Why did the diseased potato plants have such a huge impact on the human population of Ireland in the 1800's?

The humans ate almost exclusively (only) potatoes

Disease affected the meat supply

Lack of protein in the Irish human diet

A foreign insect is introduced into the Texas. It eats a lot of leaves, and trees start to become leafless . Many different animals feed on the new insect, but even they cannot control its numbers. Eventually, trees begin to die. Why would a rapid increase of the new insect population cause certain species of herbivores to vanish or be fewer in number?

They would not have enough to eat.

They would not have enough space to live.

They would not have tree bark to eat.

A manatee is a water-dwelling herbivore on the list of endangered species. If manatees were to become extinct, what would be the most likely result in areas where they had lived?

Certain producer organisms would become more abundant in the area.

Other manatees would move into the area and restore balance.

Predators in the area would have more food to eat.

The area would not be affected.

How would beavers building a dam cause an increase in the fish population? The dam

blocks a river and creates a lake.

causes predators to hunt more fish.

forces many birds to leave the ecosystem.

removes trees from around the river.

Scientists are concerned about overfishing of shark populations. Sharks feed on rays and rays feed on scallops. Without sharks, rays consume all the scallop beds. This situation demonstrates that:

humans can upset an ecosystem by removing species.

humans can improve an ecosystem by removing predators.

reducing the shark population increases the quantity of scallops that can be taken.

sharks are not important for the stability of the ecosystem.

Raccoons eat aquatic animals. If chemicals entered the lake with rain water and destroyed the plants, how would this impact the raccoon population?

Raccoons would have less aquatic animals to eat.

Raccoons would have more aquatic animals to eat.

Raccoons would begin eating land plants.

Raccoons would only drink water.

Highways allow people to travel between towns and cities, but it also divides ecosystems into smaller pieces. Animals can become separated from lakes they use for food and shelter. For example, tiger salamanders use lakes for these reasons. How could the building of highways affect animals such as the tiger salamander?

Tiger salamanders may be cut off from important resources.

Tiger salamanders could improve lake ecosystems.

Tiger salamander habitats may have less pollution.

Tiger salamander habitats within ecosystems would become larger.

Disruptions to Ecosystems Quiz

Quiz

•

Biology

•

9th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-LS2-4, MS-LS2-5, MS-LS2-1

+9

Standards-aligned

Used 89+ times

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What makes an ecosystem strong/weak in the face of change?

Climate

Average rainfall

Biodiversity

Sun exposure

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following type of diversity IS NOT an intertwined feature of biodiversity?

ecosystem

species

genetic

temperature

Tags

NGSS.MS-LS2-5

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is considered one of the most biodiverse regions on Earth?

Amazon rainforest

Salt flats of Utah

your backyard

Clear Falls Commons

Tags

NGSS.MS-LS2-5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following helps a species cope with environmental changes?

Low genetic diversity

No genetic diversity

High genetic diversity

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Species with low population numbers are more likely to be negatively impacted by fluctuations (shifts) cause by ______.

Climate change

Disease

Habitat fragmentation

All of the Above

Tags

NGSS.HS-LS4-5

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In some environments, the removal of only ONE species can cause the entire ecosystem to unravel.

TRUE

FALSE

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a keystone species or keystone organism?

A species with little importance

A species that an ecosystem's stability depends on

A species near extinction

A species with no known symbiotic relationships with other species.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

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Disruptions to Ecosystems Quiz

25 questions

What makes an ecosystem strong/weak in the face of change?

Which of the following type of diversity IS NOT an intertwined feature of biodiversity?

Which of the following is considered one of the most biodiverse regions on Earth?

Which of the following helps a species cope with environmental changes?

Species with low population numbers are more likely to be negatively impacted by fluctuations (shifts) cause by ______.

In some environments, the removal of only ONE species can cause the entire ecosystem to unravel.

What is a keystone species or keystone organism?

What happens to an ecosystem when a keystone species is removed?

Humanity has no impact on the biodiversity of most ecosystems on Earth.

Which of the following are ways humans can cause the loss of biodiversity within an ecosystem?

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