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Unit 7 Test Review

Total questions: 80

Worksheet time: 2hrs 2mins

Name
Class
Date
1.

How can deforestation affect the transfer of energy in the food web?

a)

The decline of the deer population will cause a decline in the coyote population.

b)

The mice population will increase and the insect population will decrease.

c)

The coyote population will increase as they will have more prey options.

d)

The chipmunk population will decrease and the deer population will increase.

2.

Grasses directly pass energy to...

a)

grasshopper, frog, bird

b)

mouse, rabbit, grasshopper

c)

rabbit, fox, snake

d)

frog, owl, mouse

3.

What is the frog considered in this food web?

a)

producer

b)

primary consumer

c)

secondary consumer

d)

tertiary consumer

4.

Which organism DOES NOT pass energy directly to the eagle?

a)

rat

b)

thrush

c)

frog

d)

dragonfly

5.
What does a food web represent?
a)
All connections of energy flow throughout all organisms in a habitat.
b)
The specific ways that mutualism is carried out.
c)
A single pathway or energy flow between organisms. 
d)
How carnivores get their food. 
6.
Why might an organism have more than one arrow coming from them in a food web?
a)
More than one organism may eat them. 
b)
They may eat more than one other organism. 
c)
This organism gets its energy from multiple sources. 
d)
They have no resources available to them.
7.

Where is the MOST ENERGY in the food chain?

a)

grass

b)

grasshopper

c)

eagle

d)

frog

8.

Where is the LEAST ENERGY in the food chain?

a)

grass

b)

grasshopper

c)

eagle

d)

frog

9.

Cactus

a)

Abiotic

b)

Biotic

10.

An heterotroph is another word for a ________, meaning it needs to ________

a)

Consumer, eat other organisms

b)

Consumer, go through photosynthesis

c)

Producer, make its own food

d)

Producer, survive without water

11.

An autotroph is another word for a ________, meaning it needs to ________

a)

Consumer, eat other animals

b)

Consumer, eat other plants

c)

Producer, make its own food

d)

Producer, survive without water

12.
Biodiversity refers to
a)
extinct species
b)
the variety of species on Earth
c)
nonrenewable resources
d)
the rate of species decline
13.
What is an invasive species?
a)
A native (naturally found) species which are added to an area. 
b)
A non-native (not naturally found) species added to an area. 
c)
A keystone species in an environment
d)
none of the above
14.
When taken to a new habitat, non-native plants often threaten native plants of the new habitat.  Why do they do this?
a)
Non-native plants are able to mutate rapidly
b)
Non-native  plants cause native animals to relocate
c)
Non-native plants are able to be used for medicine
d)
Non-native plants compete with native plants for resources
15.
A species that is not native to an area is called: 
a)
Native Species
b)
Natural Species
c)
Invasive Species
d)
Symbiotic Species
16.
Field mice are the primary food source for horned owls in an area. Due to a drought, many field mice left the area. Which result would this drought most likely have on the horned owls?
a)
The horned owl population will consume more field mice.
b)
Horned owls will follow the field mice to a different area.
c)
The horned owl population will increase in the area.
d)
Horned owls will change to a plant-based diet.
17.
Which is an abiotic factor that most limits the number of frogs living in a pond? 
a)
the color of the water 
b)
the number of predators 
c)
the temperature of the water 
d)
the populations of producers 
18.
Which best describes a way photosynthesis provides resources to animals?
a)
Photosynthesis produces carbon dioxide, decreasing the animal’s need for oxygen.
b)
Photosynthesis increases plant growth, providing places for many animals to live
c)
Photosynthesis produces excess moisture from the plants, reducing the need for a water supply.
d)
Photosynthesis increases plant growth, providing food for carnivores and eliminating the need to hunt.
19.
Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the most likely outcome for the ecosystem?
a)
Biodiversity would decrease, and sustainability would decrease.
b)
Biodiversity would decrease, and sustainability would increase.
c)
Biodiversity would increase, and sustainability would increase.
d)
Biodiversity would increase, and sustainability would decrease.
20.
Below is an example of a simple food chain.

Acorn → Squirrel → Fox → Mountain Lion 

What will most likely happen if squirrels are removed from the food chain?
a)
The fox will eat acorns
b)
The fox population will decrease
c)
The trees will produce fewer acorns.
d)
The mountain lion population will increase
21.
A rainforest area is experiencing a severe drought. As a consequence, the insect population has decreased. What will the insect-eating birds most likely do as a result of the drought?
a)
stop searching for food until it begins to rain
b)
begin reproducing to increase population
c)
move to a new area to find food
d)
start the process of hibernation
22.
Which is an abiotic factor that would affect the growth of a population within an ecosystem?
a)
the availability of water
b)
the availability of producers
c)
the type of herbivores present
d)
the number of carnivores present
23.
Prairie dogs rely on underground tunnels for shelter. Which bestexplains how the prairie dog population is affected when their tunnels are disrupted and exposed?
a)
The prairie dogs are burned by the sun.
b)
The prairie dogs are exposed to predators
c)
The prairie dogs can find more food to eat in the fields
d)
The prairie dogs are forced to learn to live in trees and shrubs
24.
When an ecosystem is affected by loss of shelter, what happens to the populations in that ecosystem?
a)
They can decrease or die out
b)
They are usually not affected
c)
They can readily adapt to the changes
d)
The populations increase
25.
In a forest ecosystem, a food chain might look like this:
green plants → rabbit → fox → panther

If the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?
a)
There would be fewer rabbits for the foxes to eat. 
b)
The panthers would have to begin to eat green plants.
c)
There would be an increase in the fox population
d)
There would be more green plants for the rabbits to eat
26.

Explain how floods can impact an ecosystem.

a)

Floods can cause habitat destruction, loss of biodiversity, and disruption of food chains.

b)

Floods only affect the human population, not the ecosystem.

27.

How does pollution affect ecosystems?

a)

Pollution can disrupt the balance of ecosystems by harming plants, animals, and microorganisms.

b)

Pollution has no impact on ecosystems

28.

What are some human activities that contribute to habitat destruction?

a)

Logging, renewable energy, environmental protection

b)

Deforestation, urbanization, mining, and pollution

29.

How do floods affect the biodiversity of an ecosystem?

a)

Floods can lead to the loss of habitat, displacement of species, and changes in water quality, all of which can negatively impact biodiversity.

b)

Floods have no impact on biodiversity

30.

Deforestation, pollution, over fertilizing, and fossil fuels are all ways that ______ impact the ecosystems.

a)

nature

b)

humans

c)

volcanos

d)

animals

31.

All the living and non-living things in an area describes an _________.

a)

humans

b)

nature

c)

ocean

d)

ecosystem

32.

Which action will result in the greatest decrease in rain forest stability?

a)

removing one species of plant for medicine

b)

harvesting nuts from trees

c)

cutting down all the trees for lumber

d)

powering homes with wind energy

33.
What term describes all nonliving factors in an environment?
a)
abiotic
b)
zoological
c)
biotic
d)
biological
34.

Which organisms are the basis of a marine food web?

a)

Crabs

b)

Photoplankton

c)

Fish

d)

Zooplankton

35.

The first species to live in a land, after destruction, are:

a)

Oregon Trail species

b)

Primary consumers

c)

Pioneer species

36.

After a volcano destroys the land, ________________ succession takes place.

a)

Secondary

b)

Primary

c)

Tertiary

d)

Important

37.

Gradual, natural change in an ecosystem over time:

a)

Succession

b)

Movement

c)

Evolution

d)

Change

38.

A pattern of change after existing ecosystem is destroyed, such as clearing for farming.

a)

Evolution

b)

Secondary Succession

c)

Primary Succession

39.

Primary succession takes ____________ time than secondary succession.

a)

More

b)

Less

c)

Same

40.

What type of organism would typically grow on bare rock?

a)

Moss and lichen

b)

Grass

c)

Oak trees

d)

Shrubs

41.

As ecological succession progresses, a pioneer community gradually changes into a climax community. What typically happens during this process?

a)

The number of species increases

b)

The number of species decreases

c)

The organisms in an area decrease in size

d)

The organisms in an area can no longer find food

42.
Natural disasters such as flooding and tornadoes are linked to ________________.
a)
primary
b)
secondary
c)
old field
d)
ecosystem
43.
Why does primary succession take longer to reach climax community?
a)
Because trees do not perform photosyntheses.
b)
Because climax community is in a forrest.
c)
Because primary succession already has soil
d)
Because primary succession does not have soil
44.
What is the difference between primary and secondary succession?
a)
Primary succession already has soil.
b)
Primary has soil and secondary does not
c)
soil is present in both
d)
primary has no soil and secondary has soil
45.
A climax community is ….
a)
the beginning of a new ecological succession.
b)
the rocks in a new environment.
c)
the fire that will cause destruction.
d)
an area that reaches its greatest growing potential.
46.
What is the most important function of pioneer species?
a)
To create rocks
b)
To create soil and add nutrients to the environment 
c)
To look nice
d)
Food for animals 
47.
Succession type?
a)
primary succession
b)
secondary succession
c)
tertiary succession
d)
variable succession
48.
Succession type?
a)
primary succession
b)
secondary succession
c)
tertiary succession
d)
variable succession
49.

What is the main difference between primary and secondary ecological succession?

a)

Primary begins WITHOUT soil; Secondary begins WITH soil

b)

Primary is the first state and secondary is the second stage

c)

Primary builds plant community; secondary builds animal community

d)

Primary begins WITH soil; Secondary begins WITHOUT soil

50.

During a forest fire most vegetation (plants) burn. Which ecological succession will take place after a forest fire?

a)

Primary

b)

Secondary

51.
What is the order of succession shown in this figure?
a)
A, B, C, D
b)
B, A, D, C
c)
C, D, A, B
d)
D, A, B, C
52.

Decaying lichens and moss add more ___________ to the forming soil, making conditions desirable for other plants to grow.

a)

nutrients

b)

water

c)

encouragement

d)

salsa

53.

What is causing coral bleaching?

a)

Invasive species

b)

Climate change

c)

Loss of tourism

d)

Overfishing

54.

When biodiversity increases

a)

Sustainability decreases

b)

Sustainability remains the same

c)

Sustainability also increases

d)

Sustainability becomes greater by 2

55.

Biodiversity means..

a)

The variety of life in an ecosystem

b)

How an ecosystem changes over time

c)

Differences among humans

d)

Diversity of a select few species in a deserted area

56.

When biodiversity decreases

a)

Sustainability also decreases

b)

Sustainability remains the same

c)

Sustainability increases

d)

Sustainability is not impacted

57.
What is the difference between biotic and abiotic?
a)
Biotic are non-living things
b)
Abiotic are living organisms
c)
Biotic is life,
Abiotic is non-living
d)
Biotic is non-living, Abiotic is living
58.

A rain forest ecosystem is characterized by high biodiversity and a warm/rainy climate. How might this impact the ecosystem's sustainability if the ecosystem is damaged by a catastrophic event?

a)

The ecosystem, because it has few plant and animal species, will experience low sustainability, not allowing it to recover

b)

The ecosystem, because it has many plant and animal species, will experience high sustainability, allowing it to recover

c)

Biodiversity does not have an impact on an ecosystem's sustainability

59.

What is true about sustainability?

a)

Having a small number of species increases biodiversity

b)

Sustainability is how organisms change over time

c)

Sustainability is how much rainfall and sunlight an ecosystem receives

d)

The more different types of species you have (biodiversity) the better an ecosystem can sustain itself

60.
Humans are not affected by the biodiversity of ecosystems.
a)
True
b)
False
61.
The higher the biodiversity, the more sustainable an ecosystem is.
a)
True
b)
False
62.
Sustainability refers to
a)
how many species are present in an ecosystem
b)
when a species goes extinct
c)
how long a species lives
d)
the ability to maintain ecological process over long periods of time.
63.
Biodiversity refers to
a)
extinct species
b)
the variety of species on Earth
c)
nonrenewable resources
d)
the rate of species decline
64.

What two factors would make biodiversity increase?

a)

Tornadoes and hurricanes

b)

Large amount of producers and water

c)

More predators and competition

d)

The water cycle and ocean warming

65.

What is true about sustainability?

a)

Having a small number of species increases biodiversity

b)

Sustainability is how organisms change over time

c)

Sustainability is how much rainfall and sunlight an ecosystem receives

d)

The more different types of species you have (biodiversity) the better an ecosystem can sustain itself

66.

A certain area of the Indian ocean is expected to dry up and become a desert over thousands of years. What will happen to the sustainability of this ocean?

a)

Sustainability would increase because the number of species would increase

b)

Sustainability would remain the same

c)

Sustainability would decrease because the number of species would decrease

d)

Not enough information is given

67.

Which of the following would cause biodiversity to DECREASE?

a)

Water

b)

Forest Fires

c)

Sunlight

d)

Producers

68.

When biodiversity increases

a)

Sustainability decreases

b)

Sustainability remains the same

c)

Sustainability also increases

d)

Sustainability becomes greater by 2

69.

Students were asked to make a claim supported with evidence to answer the question, "Which ecosystem would be most sustainable if all the grasses died from severe drought?" What claim is valid and supported by the evidence?

a)

A. The forest ecosystem is most suitable because there are more top predators.

b)

B. The grassland ecosystem is most sustainable because there are fewer organisms that eat grass.

c)

C. The forest ecosystem is most sustainable because most of the animals can eat other organisms.

d)

D. The grassland ecosystem is most sustainable because there is less competition for food.

70.

Based on the table of observations, which ecosystem is likely to be the least sustainable?

a)

A. Ecosystem 1, because it has the fewest species

b)

B. Ecosystem 2, because it includes both aquatic and terrestrial species.

c)

C. Ecosystem 3, because it has few predators.

d)

D. Ecosystem 4, because it supports many animals.

71.

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

a)

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

b)

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

c)

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

d)

D. Few species in the ecosystem reduces the likelihood that disease spreads through the ecosystem.

72.

An ecosystem that is not sustainable can break down when a natural disaster occurs. This can lead to organisms in the ecosystem either leaving the area or dying off. Increased biodiversity results in a more sustainable ecosystem because ---

a)

A. a greater number of plant species means that there is less barren land.

b)

B. a greater variety of species present allows more organism to adapt after changes occur

c)

C. the transition area between two ecosystems is narrower.

d)

D. there are few species to be affected by environmental stressess.

73.

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

a)

A. The prairie ecosystem, because few organisms eat grass.

b)

B. The tundra ecosystem, because there is a variety of producers.

c)

C. The prairie ecosystem, because there a fewer top predators.

d)

D. The tundra ecosystem, because it has more herbivores.

74.

What happened to the biodiversity in Yellowstone national forest with the addition of wolves to that temperate forest ecosystem?

a)

Increased

b)

Decreased

c)

Stayed the same

75.

Which of the following terms describes any major changes that may occur to an ecosystem?

a)

Disturbance

b)

Adaptations

c)

Resiliency

d)

Biodiversity

76.

Which factor is most likely to cause the number of rabbits living in an area to increase?

a)

less water

b)

lack of shelter

c)

fewer predators

d)

limited food

77.

READ THE GRAPH!

This diagram provides information on the diversity, in number of species, for four major groups of animals over time. What is the only group that experienced an increase of diversity between 413 million years ago and 265 million years ago?

a)

Mollusks

b)

Arthropods

c)

Echinoderms

d)

Chordates

78.

On the Galapagos Islands, finch populations with different beak shapes and sizes became distinct species. These species were distributed on the various islands. What statement explains why they became distinct species?

a)

Finch populations were variable. Individuals whose features were best suited to the available food supply on each island reproduced most successfully.

b)

Finch populations were essentially alike. The varied environments on the islands induced genetic changes in individuals based on the available food supply.

c)

Individual finches on each island gradually developed the beaks they needed during their lifetime.

79.
All of these finches have different shaped beaks, they are an adaptation to gain access of 
a)
Water
b)
Food
c)
Shelter
80.
The different tools used during the beaks of finches lab represented 
a)
feeding adaptations in finches 
b)
nest construction adaptations 
c)
variations in seed size 
d)
variations in ecosystems 

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