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Ecosystems Review

Total questions: 65

Worksheet time: 29mins

Name
Class
Date
1.
Plants create their own food through the process called
a)
digestion
b)
respiration
c)
transpiration
d)
photosynthesis
2.
Animals get their energy from
a)
air
b)
sunlight
c)
water
d)
food
3.
An animal that gets eaten by another animal is
a)
prey
b)
a predator
c)
an omnivore
d)
a carnivore
4.
An animal that kills and eats another animal is
a)
prey
b)
a predator
c)
an omnivore
d)
an herbivore
5.
Animals that eat only plants are
a)
herbivores
b)
omnivores
c)
carnivores
6.
Animals that eat only animals are
a)
herbivores
b)
omnivores
c)
carnivores
7.
Animals that eat plants and animals are
a)
herbivores
b)
omnivores
c)
carnivores
8.
Animals that break down the remains of living organisms are 
a)
prey
b)
predators
c)
decomposers
d)
scavengers
9.
Plants are called
a)
consumers
b)
producers
c)
prey
d)
predators
10.
In an ecosystem, grass is eaten by mice and mice are eaten by snakes.  If the snake population increases, what happens to the mouse population?
a)
increases
b)
decreases
c)
stays the same
11.
In an ecosystem, grass is eaten by mice and mice are eaten by snakes.  If the mouse population increases, what happens to the grass population?
a)
increases
b)
decreases
c)
stays the same
12.
All ecosystems get their energy from
a)
plants
b)
animals
c)

the sun

d)
batteries
13.
The producer is the
a)
grass
b)
grasshopper
c)
frog
d)
eagle
14.

The primary consumer is the

a)
grass
b)
grasshopper
c)
frog
d)
eagle
15.

Which of these is the tertiary consumer?

a)
grass
b)
grasshopper
c)

snake

d)
all of these
16.
The frog is prey for the
a)
eagle
b)
grasshopper
c)
grass
d)
snake
17.
The snake is prey for the
a)
eagle
b)
grasshopper
c)
grass
d)
snake
18.

According to the 10% rule

a)

10% of the energy is passed from one level to the next. The rest is "lost" as heat.

b)

10% of organisms in each trophic level get eaten.

c)

10% of organisms eat other organisms.

d)

10% of the energy is "lost" at each trophic level.

19.

If there are 100,000 kcal available to the plants in an ecosystem, how much energy will be available to the herbivores?

a)

1,000,000 kcal

b)

100 kcal

c)

10,000 kcal

d)

1,000 kcal

20.

This type of organism recycles nutrients back into the habitat.

a)

carnivores

b)

symbiotes

c)

decomposers

d)

autotrophs

21.

Symbiotic relationship where one benefits and one is unaffected.

a)

parasitism

b)

predation

c)

mutualism

d)

commensalism

22.

A symbiotic relationship where one benefits and the other is harmed.

a)

commensalism

b)

parasitism

c)

mutualism

d)

competition

23.

Marlin and Nemo live in a sea anemone. Clownfish receive shelter and the anemone receives protection and nutrients. What type of symbiotic relationship does this represent?

a)

mutualism

b)

predation

c)

commensalism

d)

parasitism

24.

A pearlfish lives in a sea cucumber. The sea cucumber is not affected by this interaction. This represents:

a)

mutualism

b)

competition

c)

parasitism

d)

commensalism

25.

Which of the following is a primary consumer in an ecosystem?

a)

lion

b)

grass

c)

rabbit

d)

eagle

26.

What is the main source of energy for producers in an ecosystem?

a)

water

b)

soil

c)

sunlight

d)

air

27.

Which of the following is an example of a decomposer?

a)

mushroom

b)

grasshopper

c)

frog

d)

eagle

28.
All the organisms in a particular location, including their nonliving environment
a)
ecosystem
b)
carnivore
c)
niche
d)
population
29.

Which of these best demonstrates mutualism between certain types of bacteria and humans?

a)

Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.

b)

Bacteria become resistant to antibacterial medication that humans use for treatment.

c)

Invasive bacteria at an area of injury produce toxins that damage healthy tissue of the human body.

d)

Bacteria in improperly prepared food is consumed by humans, causing food poisoning.

30.

The amount of energy the producers provide to the primary consumer is 54,000 J. How much energy was provided to secondary consumers?

a)

53,460 J

b)

5,400 J

c)

540 J

d)

54 J

31.

Which organisms are both secondary and tertiary consumers in this food web?

a)

Chemosynthetic bacteria and amphipods

b)

Zooplankton and mussels

c)

Ratfish and octopuses

d)

Galatheid crabs and zoarcid fish

32.

Which would be the most likely effect of a wildfire that burned a large area of a forest?

a)

More sugars and starches would be available for animals in the area.

b)

The availability of fossil fuels for use by industries in the area would be reduced.

c)

Less carbon dioxide would be removed from the atmosphere in the area by plants.

d)

An increase in animal respiration would increase the release of carbon dioxide in the area.

33.

How does the human body return carbon to the atmosphere in the carbon cycle?

a)

Waste products

b)

Photosynthesis

c)

Cellular respiration

d)

Formation of glucose

34.

If a forest fire occurs, what will happen to the carbon in the forest?

a)

It will go into the soil

b)

It will go into the atmosphere

c)

It will runoff into nearby streams and rivers

d)

It will be destroyed

35.

What kind of organism takes out the most carbon from the atmosphere?

a)

Plants

b)

Bacteria

c)

Animals

d)

Humans

36.

the variety of life in the world or in a particular habitat or ecosystem

a)

biodiversity

b)

demography

c)

carrying capacity

d)

poaching

37.

Why are bees considered a keystone species?

a)

The honey they make supports the bear population

b)

They pollinate flowers that produce fruit which supports the ecosystem

c)

They sting when threatened

d)

They live in hives

38.
1. What makes a species invasive?
a)
Moving to a new ecosystem and taking resources from natives 
b)
Not having papers
c)
Species that can't adapt
d)
Plants that take up too much space
39.

Is water a biotic or abiotic factor?

a)

biotic

b)

abiotic

40.

Biotic factors are ___________.

a)

non-living parts of an ecosystem

b)

living parts of an ecosystem

c)

things that once were alive, but now are dead

d)

not important parts of ecosystems.

41.

What does the word root 'bio-' mean?

a)

living

b)

dead

c)

science

d)

study

42.

all the populations of different species that live in a given area

a)

organism

b)

community

c)

biosphere

d)

molecule

43.

a group of organisms of the same species that live in the same area at the same time

a)

organism

b)

population

c)

community

d)

atom

44.
What factor would cause animals of the same species to begin competing with one another?
a)
increase in precipitation         
b)
the presence of decomposers
c)
the introduction of a new food source
d)
limited supply of resources
45.

A relationship where one organism eats another is called

a)

competition

b)

commensalism

c)

mutualism

d)

predation

46.

A relationship were one organism uses another to survive; often harming it in the process

a)

parasitism

b)

mutualism

c)

commensalism

d)

competition

47.

A relationship where two organisms want the same resource

a)

commensalism

b)

competition

c)

mutualism

d)

predation

48.

What happens to the population of a species after it reaches its carrying capacity?

a)

Increases linearly (in a straight line) over time.

b)

Increases exponentially (line is curved) over time.

c)

Decreases to zero in a very short amount of time.

d)

Remains relatively the same.

49.

What is the carrying capacity for this sheep population?

a)

1.8 million

b)

1.25 million

c)

1.6 million

d)

1.0 million

50.
If the number of births in a population is the same as the number of deaths in a population, what will happen to the growth of the population?
a)
It will increase.
b)
It will decrease.
c)
It will stay the same.
d)
It will fluctuate.
51.
What growth pattern describes a population whose growth rate slows or stops following a period of exponential growth?
a)
logistic growth
b)
population growth
c)
exponential growth
d)
predator-prey cycle
52.
What type of growth is shown in the diagram?
a)
exponential growth
b)
logistic growth 
c)
predator-prey cycle
d)
boom-bust curve
53.
When a population grows past the ecosystem's carrying capacity, what happens to the population?
a)
Continues to grow
b)
The population starts to die off to return to carrying capcity
c)
The population will go extinct due to lack of resources
d)
The population grows then finds a new carrying capacity
54.

A small island nation is tracking its total population.  It started with exactly 100 people. During the year, 10 people immigrated, while 20 emigrated.  The birth rate was 15, and the death rate was 5.  What is the new population of the country?

a)

115

b)

110

c)

90

d)

100

55.

What is a density-dependent factor?

a)
A density-dependent factor is a factor that influences population growth based on the weather conditions.
b)
A density-dependent factor is a factor that affects population size regardless of density.
c)
A density-dependent factor is a factor that only impacts individual organisms within a population.
d)
A density-dependent factor is a factor that influences population regulation based on the population's density.
56.
Which of the following is a density-independent limiting factor?
a)
natural disaster
b)
predation
c)
disease
d)
parasitism
57.
What is the carrying capacity of the following graph?
a)
1000
b)
8000
c)
800
d)
600
58.

Where on the graph has the population reached its carrying capacity?

a)

A to B

b)

B to C

c)

A to C

59.

Things that prevent a population from growing exponentially.

a)

Population

b)

Carrying Capacity

c)

Limiting Factors

60.

An organism that produces its own energy is called a(n)

a)

Autotroph

b)

Heterotroph

c)

Detritivore

d)

Omnivore

61.

If there is 3500 Kcal available in trophic level 1, how much energy is available in trophic level 2?

a)

35000 Kcal

b)

35 Kcal

c)

350 Kcal

d)

0.35 Kcal

62.

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

a)
80%
b)
90%
c)
10%
d)
20%
63.

What is an example of a density-independent limiting factor?

a)

food

b)

parasites

c)

disease

d)

pollution

64.
Which organisms in the food web shown to the right are predators that compete for the same prey in this environment?
a)
Coyotes and rabbits
b)
White-tailed deer and rabbits
c)
Leafy weeds and cotton rats
d)
Bobcats and coyotes
65.
What level consumer could you consider the deer?  
a)
Primary
b)
Secondary
c)
Tertiary
d)
Quarternary

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