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Life Science Unit Test

Total questions: 101

Worksheet time: 2hrs 31mins

Name
Class
Date
1.

any living thing

a)

habitat

b)

organism

c)

species

d)

community

2.

the location in which an organism lives

a)

niche

b)

organism

c)

habitat

d)

species

3.

a living or once living part of an animal's habitat

a)

species

b)

population

c)

abiotic factor

d)

biotic factor

4.

a nonliving part of an organism's habitat

a)

biotic factor

b)

abiotic factor

c)

species

d)

community

5.

the location which an organism lives

a)

organism

b)

species

c)

biotic factor

d)

habitat

6.

any kind of organism that is native to an ecosystem and does not cause harm

a)

native species

b)

invasive species

c)

species

d)

habitat

7.

any kind of organism that is not native to an ecosystem and causes harm

a)

native species

b)

invasive species

c)

species

d)

habitat

8.

causes harm

a)

habitat

b)

detrimental

c)

homeostasis

d)

niche

9.

a group of organisms that share similar characteristics and can mate with each other to produce offspring

a)

species

b)

population

c)

community

d)

ecosystem

10.

a group of different populations that live together and interact in an environment

a)

species

b)

population

c)

community

d)

ecosystem

11.

all the living and nonliving things in an area that interact with each other

a)

species

b)

population

c)

community

d)

ecosystem

12.

The study of how organisms interact with each other and their environment

a)

habitat

b)

niche

c)

ecology

d)

homeostasis

13.

the place or role that an organism has in its habitat

a)

homeostasis

b)

species

c)

ecosystem

d)

niche

14.

the ability of the internal systems of an organism to maintain normal balance, despite external conditions

a)

niche

b)

homeostasis

c)

habitat

d)

species

15.

animal bone

a)

Biotic factor

b)

Abiotic factor

16.

dirt

a)

biotic factor

b)

abiotic factor

17.

fallen tree

a)

biotic factor

b)

abiotic factor

18.

grass

a)

biotic factor

b)

abiotic factor

19.

tree

a)

biotic factor

b)

abiotic factor

20.

water

a)

biotic factor

b)

abiotic factor

21.

What level of ecological organization do the animals represent?

a)

Species

b)

Population

c)

Community

d)

Ecosystem

22.

What level of ecological organization do the organisms represent?

a)

Species

b)

Population

c)

Community

d)

Ecosystem

23.

What level of ecological organization does the bird represent?

a)

Organism

b)

Population

c)

Community

d)

Ecosystem

24.

What level of ecological organization does this entire picture represent?

a)

Organism

b)

Population

c)

Community

d)

Ecosystem

25.

What level of ecological organization does this entire picture represent?

a)

Organism

b)

Population

c)

Community

d)

Ecosystem

26.
Cattle egrets foraging in fields among cattle. The egret gets easy access to food and the cattle don't care if they are there or not.
a)
mutualism
b)
commensalism
c)
competition
d)
parasitism
27.
Remoras are small fish that swim close to or attach themselves to sharks.  Remoras eat small scraps left as the sharks feed and the sharks are unaffected. 
a)
Competition
b)
Predation
c)
Mutualism
d)
Commensalism
28.
A tapeworm and a dog have this type of relationship.
a)
mutualism
b)
parasitism
c)
commensalism
d)
competition
29.
Barnacles create home sites by attaching themselves to whales. Since the barnacle is a filter feeder, it also gets access to more water (and food) due to the relationship. The whale is unaffected.
This is an example of which type of symbiosis?
a)
Commensalism
b)
Mutualism
c)
Parasitism
d)
Competition
30.
Wrasse fish feed on the parasites found on the black sea bass's body (usually in the mouth). This is like dental floss for the fish and both species benefit.
This is an example of which type of symbiosis?
a)
Commensalism
b)
Mutualism
c)
Parasitism
d)
Predation
31.
Ostriches and gazelles feed next to each other. They both watch for predators. Because the visual abilities of the two species are different, they can each identify threats that the other animal may not see as readily. Both species benefit.
This is an example of which type of symbiosis?
a)
Commensalism
b)
Mutualism
c)
Parasitism
d)
IDK
32.
Clown fish live among anemones, acting as a lure for the sea anemone's prey. The clown fish gets protection and shelter from the anemone.
This is an example of which type of symbiosis?
a)
Commensalism
b)
Mutualism
c)
Parasitism
d)
IDK
33.
Mistletoe extracts water and nutrients from the spruce tree to the detriment (ill effect) of the spruce.
This is an example of which type of symbiosis?
a)
Commensalism
b)
Mutualism
c)
Parasitism
d)
IDK
34.
Oxpecker birds feed on the ticks found on a rhinoceros. Both species benefit since the oxpecker gets food and the rhino gets rid of a parasite.
This is an example of which type of symbiosis?
a)
Commensalism
b)
Mutualism
c)
Parasitism
d)
IDK
35.
Bacteria in the intestines of cows gain nutrients and aid in the cow's'  digestion
a)
commensalism
b)
mutualism
c)
parasitism
d)
competition
36.
As bison walk through grass, insects become active and are seen and eaten by cowbirds. This relationship neither helps nor harms the bison.
This is an example of which type of symbiosis?
a)
Commensalism
b)
Mutualism
c)
Parasitism
d)
IDK
37.
A relationship between two organisms in which one organism benefits and the other is unharmed...
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
38.
 Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower. What type of symbiosis is this?
a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
39.
 Skunks often live in burrows that have been dug and abandoned by woodchucks. This relationship is an example of _______.
a)
commensalism
b)
mutualism
c)
parasitism
d)
predation
40.
A relationship between two organisms in which both organisms benefit. 
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
41.
A relationship between two species where one benefits while the other is harmed.
a)
Mutualism
b)
Commensalism
c)
Parasitism
d)
Naturalism
42.
A relationship between two organisms in which both organisms benefit. 
a)
Mutualism 
b)
Competition
c)
Parasitsm 
d)
Commensalism 
43.
Lice attach to the hairs of the body or head, and then suck blood from the host. This relationship is known as ________. 
a)
Commensalism
b)
Parasitism
c)
Mutualism
d)
Optimism
44.
a relationship that occurs when two or more organims of the same species need the same resource at the same time
a)
competition
b)
symbiosis
c)
predation
45.

Symbiosis means:

a)

relationship

b)

sharing

c)

helping

d)

harming

46.

Parasitism means:

a)

Living on or in another organism at that organisms expense

b)

consuming another organism

c)

getting a benefit from another organism without harming or helping it

d)

getting a benefit from another organism while helping it

e)

belonging in the same niche with limited resources

47.

Commensalism means:

a)

Living on or in another organism at that organisms expense

b)

consuming another organism

c)

getting a benefit from another organism without harming or helping it

d)

getting a benefit from another organism while helping it

e)

belonging in the same niche with limited resources

48.

mutualism means:

a)

Living on or in another organism at that organisms expense

b)

consuming another organism

c)

getting a benefit from another organism without harming or helping it

d)

getting a benefit from another organism while helping it

e)

belonging in the same niche with limited resources

49.

competition means:

a)

Living on or in another organism at that organisms expense

b)

consuming another organism

c)

getting a benefit from another organism without harming or helping it

d)

getting a benefit from another organism while helping it

e)

belonging in the same niche with limited resources

50.
An organism that is eaten by another organism
a)
pray
b)
prey
c)
predator
d)
hamburger
51.
A frog eats a fly. The frog and fly are demonstrating ________.
a)
mutualism
b)
competition
c)
predator/prey
d)
parasitism
52.
______________ occurs when more than one individual or population tries to use the same limited resource.
a)
Niche
b)
Predator-prey
c)
Availability
d)
Competition
53.
A feeder 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)
Mutualism
b)
Commensalism
c)
Parasitism
d)
Decomposition
54.

What may happen if the grasshoppers were removed from the food web pictured?

a)

The rabbit population in the habitat would increase.

b)

The micer population would decrease because its the only food for the owls.

c)

The grass population would decrease because all the birds are eating it.

d)

Foxes would dies due to no food source.

55.

Based on the graph, what happens to the amount of kelp as sea otter numbers decrease?

a)

As the sea otter population decreases, kelp increases.

b)

As the sea otter population decreases, kelp decreases.

c)

As the sea otter population decreases, kelp doesn't change.

56.

What happens if a population grows past its carrying capacity?

a)

The population keeps growing

b)

The population starts to die off

c)

The entire species will go extinct

d)

The carrying capacity just increases

57.

The largest number of individuals that an environment can support long term is...

a)

carrying capacity

b)

emigration

c)

immigration

d)

population density

58.

Something that regulates the size of a population is called...

a)

a limiting measure

b)

a limiting factor

c)

carrying capacity

d)

biodiversity

59.

When a population grows past the ecosystem's carrying capacity, what happens to the population?

a)

It continues to grow higher and higher.

b)

The population starts to die off and returns to the carrying capacity.

c)

The population will go extinct due to lack of resources.

60.

The graph to the right shows the interaction of the wolf and moose populations on Isle Pekie. If the moose population continues to increase, the wolves' food supply will increase. What will most likely happen to the wolf population as a result?

a)

It will decrease.

b)

It will increase.

c)

It will remain the same.

61.

The picture to the right represents a sunny, dry desert.

Which factor most likely limits the desert’s carrying

capacity for plant life?

a)

the number of animals that eat plants

b)

the amount of sunlight

c)

the availability of space to grow

d)

the availability of water

62.

A population of salamanders that live in a river require clear, fresh water to survive. New housing developments have caused tons of sediment to muddy the river. Which

of these most likely will happen to the salamander population?

a)

The salamanders go live on land.

b)

The salamanders will move across land to another river.

c)

The salamanders will quickly adapt to living in the muddy water.

d)

The salamanders will decrease in number because of the water quality.

63.

a model that shows many different feeding relationships among living things

a)

food web

b)

food chain

c)

energy pyramid

d)

food pyramid

64.

a model that shows one set of feeding relationships among living things

a)

food web

b)

food chain

c)

food pyramid

d)

energy pyramid

65.

an organism that eats other living things to get energy; an organism that does not produce its own food (related word: consume)

a)

producer

b)

consumer

c)

adaptation

d)

food chain

66.

an animal that eats only other animals

a)

producer

b)

herbivore

c)

carnivore

d)

omnivore

67.

an animal that consumes only plants

a)

producer

b)

herbivore

c)

carnivore

d)

omnivore

68.

an animal that consumes only plants

a)

producer

b)

herbivore

c)

carnivore

d)

omnivore

69.

animal that feeds on animal remains

a)

producer

b)

scavenger

c)

carnivore

d)

omnivore

70.

an animal that eats plants as well as other animals

a)

producer

b)

herbivore

c)

carnivore

d)

omnivore

71.

organisms which carry out the process of decomposition by breaking down dead or decaying organisms

a)

scavenger

b)

carnivore

c)

decomposer

d)

omnivore

72.

the process by which the characteristics of a species change over many generations in response to the environment (related word: adapt)

a)

producer

b)

consumer

c)

decomposer

d)

adaptation

73.

the process in which plants and some other organisms use the energy in sunlight to make food

a)

producer

b)

ecology

c)

photosynthesis

d)

heterotroph

74.

organisms which carry out the process of decomposition by breaking down dead or decaying organisms

a)

scavenger

b)

carnivore

c)

decomposer

d)

omnivore

75.

the substances present before a chemical reaction occurs; in a chemical reaction the arrow usually points away from the reactant(s)

a)

reactants

b)

photosynthesis

c)

products

d)

heterotroph

76.

an organism that cannot create its own energy and must instead rely on consuming nutrients from other organisms

a)

autotroph

b)

heterotroph

c)

reactants

d)

products

77.

a model that shows the available amount of energy in each trophic layer in an ecosystem

a)

energy pyramid

b)

food web

c)

food chain

d)

food pyramid

78.

organisms that consume producers for energy and nutrients

a)

secondary consumer

b)

primary consumer

c)

producer

d)

carnivore

79.

an animal which feeds on primary consumers in the food chain

a)

primary consumer

b)

secondary consumer

c)

tertiary consumer

80.

a third-level consumer that feeds only on secondary consumers

a)

primary consumer

b)

secondary consumer

c)

tertiary consumer

81.

In the food web above, what eats the rabbit?

a)

Fox

b)

Hawk

c)

Vole

d)

Grass

82.

In the food web above, what organism is missing from this food chain:

Grass --> Slug --> ________ --> Hawk

a)

Vole

b)

Frog

c)

Insect

d)

Thrush

83.

In the energy pyramid, what is the bottom level composed of?

a)

Producers

b)

First-Level Consumers

c)

Second-Level Consumers

d)

Third-Level Consumers

84.
Which organism gets its energy by eating sea otters?
a)
Sea urchins
b)
Sea Stars
c)
Sharks
d)
Large crabs
85.
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?
a)
10 Kcal
b)
1 Kcal
c)
100 Kcal
d)
1000 Kcal
86.
A consumer gets energy by doing what?
a)
Making it themselves.
b)
Breaking down biotic wastes and dead organisms and returning raw materials to the ecosystem.
c)
Soaking it up from the ground.
d)
Feeding on other organisms.
87.
A food chain is?
a)
Overlapping food chains in an ecosystem.
b)
The amount of energy that moves from one feeding level to another in a food web.
c)
A series of events in which one organism eats another and obtains energy.
d)
biotic and abiotic factors in an area.
88.
An organism that uses sunlight to create its own food is known as a:
a)
Producer
b)
Heterotroph
c)
Consumer
d)
Decomposer
89.

Which kind of organism is an autotroph?

a)

consumer

b)

producer

c)

decomposer

d)

herbivore

90.

Which process do plants use to turn sunlight into food energy?

a)

photosynthesis

b)

cellular respiration

c)

transpiration

d)

evaporation

91.

Which organisms are heterotrophs?

a)

photosynthesizers

b)

producers

c)

consumers

d)

plants

92.

Which organism is an example of a producer?

a)

moth

b)

mushroom

c)

rose bush

d)

cheetah

93.

Which organisms are heterotrophs?

a)

photosynthesizers

b)

producers

c)

consumers

d)

plants

94.

Maggots feed on dead and decaying organisms for energy. What are maggots?

a)

autotrophs

b)

producers

c)

decomposers

d)

heterotrophs

95.

In the food chain below, which is the producer?


grass --> mouse --> snake --> hawk

a)

grass

b)

mouse

c)

snake

d)

hawk

96.

What would happen to this food chain if we doubled the population of the rabbits?

a)

The populations of the snakes and hawks would also increase.

b)

The populations of the grass, snakes, and hawks would decrease.

c)

The grass population would decrease. The snake and hawk population would increase.

d)

The grass and hawk population would decrease. The snake population would increase.

97.

What is this an example of?

a)

Food chain

b)

Food web

c)

Energy pyramid

d)

Energy web

98.

What would happen to this food chain if we doubled the population of the rabbits?

a)

The populations of the snakes and hawks would also increase.

b)

The populations of the grass, snakes, and hawks would decrease.

c)

The grass population would decrease. The snake and hawk population would increase.

d)

The grass and hawk population would decrease. The snake population would increase.

99.

Cannot make its own food

a)

Autotroph

b)

Producer

c)

Heterotroph

d)

Biomass

100.

Get their energy from the sun and make their own food

a)

Decomposer

b)

Heterotroph

c)

Biomass

d)

Producer

101.

Which level has the fewest organisms?

a)

Tertiary

b)

Secondary

c)

Primary

d)

Quaternary

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