Quiz about USA 2 Alterations in Ecosystems Review

Question 1

What type of succession is shown going from figure A to figure B?

Accepted Answer

secondary succession

Answer

primary succession

Answer

eutrophication

Answer

intermediate

Question 2

After a forest fire, an ecosystem would start regrowth through -

Accepted Answer

secondary succession

Answer

primary succession

Answer

climax community

Answer

limiting factors

Question 3

Starts with BARE ROCK followed by lichen

Accepted Answer

primary succession

Answer

secondary succession

Answer

both types of succession

Question 4

If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?

Accepted Answer

100Kcal

Answer

10Kcal

Answer

1Kcal

Answer

1000Kcal

Question 5

What would happen to the bird if the green fish died out?

Accepted Answer

The bird population will die out

Answer

The bird population would grow

Answer

The smaller fish will die out

Question 6

Biodiversity leads to

Accepted Answer

Increased Stability

Answer

Decreased Stability

Answer

Increased Exctintions

Answer

Increased Endangered Species

Question 7

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

Accepted Answer

There would be a decrease in the grass/flowers population.

Answer

There would be a decrease in the small bird population.

Answer

There would be a decrease in the mice population.

Answer

There would be an increase in the grass/flowers population.

Question 8

What may happen if the snowshoe hare was removed from the food web pictured?

Accepted Answer

The shrew population would decrease due to being only hawk food source.

Answer

The insects in the habitat would increase.

Answer

The willow tree population would decrease.

Answer

Foxes would dies due to no food source.

Question 9

A pilot fish usually follows behind sharks to pick up food scraps that they leave behind. The fish gets food and the shark is unaffected. This is an example of:

Accepted Answer

Commensalism

Answer

Mutualism

Answer

Parasitism

Answer

Decomposition

Question 10

A clownfish uses a sea anenome as a safe place to live. While living there, the clownfish lures in food for the anenome. This is an example of what type of relationship?

Accepted Answer

Mutualism

Answer

Predator-Prey

Answer

Commensalism

Answer

Parasitism

Question 11

When predator numbers decrease, prey numbers ____________ because fewer of them are being consumed.

Accepted Answer

increase

Answer

decrease

Answer

stay the same

Answer

divide in half

Question 12

A mongoose eating ticks off a warthog, or a starling eating ticks off a cow are examples of what type of symbiotic relationship?

Accepted Answer

Mutualism

Answer

Cooperation

Answer

Parasitism

Answer

Commensalism

Question 13

What would most likely happen if an ecosystem no longer received sunlight?

Accepted Answer

All living organisms would eventually die

Answer

The number of herbivores would increase

Answer

The number of plants would increase

Answer

all organisms would adapt

Question 14

Examples of how humans negatively affect local ecosystems are

Accepted Answer

Building dams, deforestation (cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads.

Answer

Creating laws to prohibit fishing from local streams.

Answer

Planting trees and other plants to attract native species.

Answer

Removing non-native species from the environment.

Question 15

A species that is not native to an area is called:

Accepted Answer

Invasive Species

Answer

Native Species

Answer

Natural Species

Answer

Symbiotic Species

Question 16

Which answer is true regarding biodiversity?

Accepted Answer

An ecosystem is healthier when the biodiversity is great.

Answer

As long as there are enough producers, an ecosystem is considered to have a good amount of biodiversity.

Answer

The rain forest has an unhealthy ecosystem because its biodiversity is too great.

Answer

Biodiversity is positively affected when non-native species are introduced into an environment

Question 17

How might deforestation impact this ecosystem?

Accepted Answer

Insects and birds will decrease

Answer

Birds will increase

Answer

Squirrels will increase

Answer

Insects and birds will increase

Question 18

Describe what would happen to the zebra population and the plant population if the cheetah and hyena both left the ecosystem.

Accepted Answer

The zebra population would greatly increase, causing the plant population to decrease.

Answer

The zebra population would decrease with the absence of predators; the plant population would stay the same.

Answer

The zebra population would decrease, causing the plant population to increase.

Answer

The zebra population would greatly increase, causing the plant population to also increase.

Question 19

The San Marcos salamander, Eurycea nana, is a light reddish-brown translucent salamander about 2-5 cm in length. E. nana is found only in Spring Lake and a portion of the San Marcos River.

Which human activity would most likely decrease the ability of the salamanders to survive?

Accepted Answer

Increasing water consumption that decreases the flow of clean water from the springs that feed the river.

Answer

Public transportation that reduces the number of automobiles that contribute to pollution runoff into the river.

Answer

Tourism that helps fund the education programs related to tiver ecosystem conservation.

Answer

The addition of a new food source into the river that limits competition for resources.

Question 20

In the mid-1980s an aggressive strain of algae known as Caulerpa was accidentally introduced into the Mediterranean Sea when a seaside aquarium cleaned out its tanks. The algae contains a toxin that prevents native herbivores from consuming it. Caulerpa quickly spread over the sea floor, crowding out many species including sponges, corals, sea fans, and lobsters.

Which statement explains the most likely impact Caulerpa has had on the biodiversity of the Mediterranean Sea?

Accepted Answer

Caulerpa became dominant within the ecosystem and reduced the biodiversity.

Answer

The presence of Caulerpa within an ecosystem is an indicator of the ecosystem's health.

Answer

The spread of Caulerpa improved the habitat for many species of sea grasses, and increased the biodiversity.

Answer

Caulerpa interbred with native species with the smae adaptations within the ecosystem.

Question 21

Food webs such as the one shown were first used in 1927 by the animal ecologist Charles Elton. The food web below represents the feeding relationships among organisms in an Alaskan ecosystem.

An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?

Accepted Answer

Zooplankton

Answer

Auklets

Answer

Foxes

Answer

Salmon

Question 22

Accepted Answer

Pink salmon populations seemed to be minimally affected

Answer

Pink salmon were nearly eliminated after the oil spill

Answer

Pink salmon populations steadily declined in the 10 years following the spill

Answer

Pink salmon populations declined and never fully recovered

Question 23

Invasive species spread so quickly because they don't have any predators.

Accepted Answer

True

Answer

False

Question 24

Which ecosystem has the most biodiversity?

Accepted Answer

Question 25

A group of people in your town decide they will each use a portion of their yard to plant a variety of native plants. Fifty families replace a part of their yard with native plants.

Which of these is most likely to happen?

Accepted Answer

The biodiversity of the town will increase.

Answer

The population of the town will decrease.

Answer

Native animals will move away.

Question 26

The island country of New Zealand has no native mammals. Its ecosystem is based on birds. Humans brought cats to the island. Cats hunted the kiwi, a flightless bird, almost to extinction.

Which word best describes cats in this scenario?

Accepted Answer

invasive species

Answer

keystone species

Answer

native species

Question 27

Beavers are a keystone species in North America. The dams beavers build create ponds where many other organisms live.

What will most likely happen to an ecosystem if humans remove the beavers?

Accepted Answer

The ecosystem will change.

Answer

The biodiversity of the ecosystem will increase.

Answer

The ecosystem will become stable.

Question 28

The most diverse ecosystems on Earth are the ______________________

Accepted Answer

Tropical Rainforest

Answer

Desert

Answer

Deciduous Forest

Answer

Tundra

Question 29

If all the members of a species disappears from Earth, the species is said to be?

Accepted Answer

Extinct

Answer

Threatened

Answer

Endangered

Answer

Keystone species

Question 30

The combined genetic information of all members of a particular population forms a

Accepted Answer

gene pool

Answer

phenotype

Answer

population

Answer

niche

Question 31

The variety of different types of genes in a species or population

Accepted Answer

Genetic variation

Answer

Speciation

Answer

Artificial selection

Answer

Evolution

Question 32

Mutations are important because they bring about

Accepted Answer

genetic variations needed for a population to evolve.

Answer

death of the organisms in which they develop.

Answer

benefits fro the individual not for the population.

Answer

changes in a genotype but not phenotype.

Question 33

A population is

Accepted Answer

a group of the same species in the same geographic area.

Answer

a group of similar species in different areas

Answer

a group of several species in the same geographic area

Answer

a group of several species along with their abiotic factors in a small area.

Question 34

A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.

What effect does continual mowing have on the ecology of the field?

Accepted Answer

Mowing maintains a low species diversity by inhibiting further succession.

Answer

Mowing increases the likelihood of nonnative species displacing native species.

Answer

Mowing increases the number of species found in the field.

Answer

Mowing causes different types of communities to form across the field.

USA 2 Alterations in Ecosystems Review

40 questions

What type of succession is shown going from figure A to figure B?

After a forest fire, an ecosystem would start regrowth through -

Starts with BARE ROCK followed by lichen

If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?

What would happen to the bird if the green fish died out?

Biodiversity leads to

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

What may happen if the snowshoe hare was removed from the food web pictured?

A pilot fish usually follows behind sharks to pick up food scraps that they leave behind. The fish gets food and the shark is unaffected. This is an example of:

A clownfish uses a sea anenome as a safe place to live. While living there, the clownfish lures in food for the anenome. This is an example of what type of relationship?

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