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Principles of Ecology

Total questions: 83

Worksheet time: 1hrs 27mins

Name
Class
Date
1.
Which level of organization is the most complex?
a)
organism
b)
population
c)
community
d)
ecosystem
2.
Multiple organisms of the same species describes a
a)
organism
b)
population
c)
community
d)
ecosystem
3.
What do ecosystems have that the other three levels of organization do not have?
a)
living things
b)
biotic factors
c)
abiotic factors
d)
organisms
4.
A forest full of many kinds of trees and grasses is an example of a
a)
group
b)
organism
c)
population
d)
community
5.
Which is an example of an organism?
a)
a beetle
b)
a lake
c)
a rock
d)
a shell
6.
Which is an example of an ecosystem?
a)
Jungle animals
b)
forest plants
c)
The tundra
d)
Savanna temperatures
7.
Which level of organization is more complex than a population and less complex than an ecosystem?
a)
organism
b)
population
c)
community
d)
ecosystem
8.
Which is an example of a population?
a)
different kinds of bacteria
b)
A group of fish and sharks
c)
deer, bear, and rabbits
d)
A herd of cattle
9.
which is the correct order of the levels of organization from simple to complex?
a)
organism, population, community, ecosystem
b)
ecosystem, community, population, organism
10.
which is another word for an organism?
a)
abiotic factor
b)
biotic factor
c)
nonliving thing
11.
Which is the definition of a community
a)
multiple organisms of the same species
b)
all the living and nonliving things in an area
c)
a living thing
d)
multiple organisms of different species
12.

Organisms who are members of the same species in an ecosystem.

a)

Organism

b)

Population

c)

Organ

d)

Community

13.

Any single living individual, and can refer to a single human, animal, plant,

Protista, bacteria, or fungi.

a)

Community

b)

Cell

c)

Population

d)

Organism

14.

Group of populations in an area.

a)

Organism

b)

Ecosystem

c)

Community

d)

Biosphere

15.

A biological community that includes various species and their physical environment (Biotic and Abiotic Factors).

a)

Organism

b)

Community

c)

Biosphere

d)

Ecosystem

16.

Where life is found on earth.

a)

Community

b)

Habitat

c)

Ecosystem

d)

Biosphere

17.

Which term best describes two predators living in the same habitat who feed on the same prey?

a)

coexistence

b)

competition

c)

mutualism

d)

predatory

18.

A pride of lions stalks, tackles, and kills an antelope. Which is best being demonstrated?

a)

predation

b)

mutualism

c)

parasitism

d)

commensalism

19.
Which of these is an example of one living thing depending on another living thing?
a)
Cat walking on the sand
b)
Bird building a nest in a tree
c)
Dog warming in the sunlight
d)
Squirrel drinking water
20.
Living and nonliving things interacting in an environment is called:
a)
A. Organism
b)
B. Producer
c)
C. Consumer
d)
D. Ecosystem
21.

A tapeworm inside a dog is

a)

competition

b)

predation

c)

commensalism

d)

parasitism

22.

A symbiotic relationship that involves species having to fight for something they both need or want

a)

competition

b)

predation

c)

commensalism

d)

parasitism

23.

relationship in which two species live closely together

a)

resource

b)

mutualism

c)

succession

d)

symbiosis

24.

A living relationship between two species in which one organism is harmed is called...

a)

mutualism

b)

commensalism

c)

parasitism

d)

niche

25.

symbiotic relationship in which one organisms benefits and the other organism is not affected

a)

invasive (non-native) species

b)

mutualism

c)

parasitism

d)

commensalism

26.

symbiotic relationship in which both organisms benefit

a)

competition

b)

Mutualism

c)

nitrogen fixation

d)

energy pyramid

27.

Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales. What kind of relationship is this?

a)

Mutualism

b)

Parasitism

c)

Commensalism

d)

Predatory

28.

What type of symbiosis is this?

*Hermit crabs find shells left by snails that have died and move in.

* Snails die and leave behind their shells.

a)

commensalism

b)

mutualism

c)

parasitism

d)

predation

29.

The crocodile and bird have a _______________ relationship. The crocodile benefits by having its teeth cleaned. The bird benefits by gaining food and protection. Both animals benefit from this relationship.

a)

parasitism

b)

predator and prey

c)

mutualism

d)

commensalism

30.

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?

a)

Predator-Prey

b)

Commensalism

c)

Mutualism

d)

Parasitism

31.

_____________ are LARGE areas that have similar climate, plant life, and animals.

a)

ecosystem

b)

habitat

c)

population

d)

biomes

32.

What the non-living factor that is the most important to an ecosystem to work?

a)

Water

b)

The sun's energy

c)

Plants

d)

animals

33.
Which example shows a relationship between a living thing and a non-living thing?
a)
An insect is food for salmon.
b)
Water carries a rock downstream.
c)
A tree gets nutrients from the soil.
d)
A flower makes food for a butterfly.
34.
Mushrooms are helping to break down the remains of a rotting log in the forest. how do the actions of the mushrooms benefit the other plants in the area?
a)
By returning nutrients to the soil.
b)
By releasing oxygen into the air.
c)
By making space for new animals.
d)
By decreasing the population of herbivores.
35.
If the population of prey increases, the population of predators will ________because of the availability of food.
a)
decrease
b)
stay the same
c)
increase
36.
A group of one type of organisms is called a(n) ___________.
a)
Organism
b)
Population
c)
Community
d)
Ecosystem
37.
Which of the following is an example of a biotic factor?
a)
Water
b)
Oxygen
c)
Rocks
d)
Leaves
38.
Which of the following is an example of an abiotic factor?
a)
Flowers
b)
Sunlight
c)
Animal scat
d)
Insects
39.
Which of the following is not an example of a limiting factor?
a)
Happiness
b)
Space
c)
Predators
d)
Food
40.

What non-living factor is the most important for an ecosystem to work?

a)

Rock

b)

Sun

c)

Plants

d)

Animals

41.
Which term best describes two predators living in the same habitat who feed on the same prey?
a)
coexistence
b)
competition
c)
mutualism
42.
The Texas Kangaroo Rat, native to north-central Texas, makes its home in mesquite bushes.  If the mesquite bushes are cleared for human homes , which of the following is the most probable result?
a)
The rat population will rise (increase).
b)
The rat population will decline (decrease).
c)
The rat population will stay the same.
d)
The rat population will double.
43.
Dead matter and waste would pile up without which type of organism?
a)
decomposer
b)
consumer
c)
producer
44.
As a dog walks through thick brush, a tick attaches to its leg. Which best describes the relationship between the dog and the tick?
a)
parasitism
b)
mutualism
c)
commensalism
45.
A pride of lions stalks, tackles, and kills an antelope. Which is best being demonstrated?
a)
predation
b)
mutualism
c)
cooperation
46.
Living and nonliving things interacting in an environment is called:
a)
A. Organism
b)
B. Producer
c)
C. Consumer
d)
D. Ecosystem
47.
An animal that is hunted and eaten for food is a 
a)
predator
b)
prey
c)
population
48.

What type of interaction does this picture represent? (All of the animals are drinking from the same small watering hole)

a)

parasitism

b)

Commensalism

c)

Competition

d)

Mutualism

49.

Look at this food chain. What would MOST LIKELY happen if the rabbit population suddenly becomes much larger?

a)

The clover population would decrease and the coyote population would increase.

b)

The clover population would decrease and the coyote population would decrease.

c)

The clover population would increase and the coyote population would decrease.

d)

The clover population would increase and the coyote population would increase.

50.

A new species of beetle is introduced in an ecosystem where it has no natural predators. What is the BEST prediction a scientist can make about what might happen in the ecosystem?

a)

All consumers in the ecosystem will starve.

b)

The beetles may overpopulate the ecosystem.

c)

The beetles will hibernate and not appear for years.

d)

Birds and reptiles will disappear from the ecosystem.

51.

What most likely would happen if the frog population decreased in the area?

a)

The grass would grow taller.

b)

The fish population would increase.

c)

The heron would have more fish to eat.

d)

The grasshopper population would increase.

52.

The diagram below shows a prairie food web. Many garter snakes have moved out of the ecosystem due to colder temperatures. Which statement best predicts what will happen in the ecosystem?

a)

The mouse population in the ecosystem will decrease.

b)

The hawk population in the ecosystem will increase.

c)

The spider population in the ecosystem will decrease.

d)

The toad population in `the ecosystem will increase.

53.

In a balanced forest ecosystem, a disease killed many of the rodents. Which of the following is most likely to occur after this happens?

a)

The numbers of owls will decrease.

b)

The amount of plants will decrease.

c)

The insect population will decrease.

d)

The number of deer will increase.

54.
What do the arrows in the food chain show?
a)
The transfer of energy
b)
What animals eat
c)
The order of animal dominance
55.
A diagram of a food web is shown below.Which organism receives the least amount of energy from the producers?
a)
Hawk
b)
Rabbit
c)
Grasshopper
d)
Mouse
56.

Which of the following is a tertiary consumer from the food web shown?

a)

Kite

b)

Owl

c)

Jackal

d)

Tree

57.
A food web consists of?
a)
Many overlapping food chains in an ecosystem.
b)
A series of events in which one organism eats another and obtains energy.
c)
Amount of energy that moves from one feeding level to another.
d)
Many types of insects that are stuck.
58.

An animal that eats both plants and meat is called a

a)

herbivore

b)

carnivore

c)

omnivore

d)

decomoposer

59.
A third-level consumer has to be which type?
a)
Carnivore.
b)
Decomposer.
c)
Producer.
d)
Herbivore.
60.
An animal that eats other animals is a....
a)
carnivore
b)
omnivore
c)
herbivore
d)
decomposer
61.
Which level will contain plants?
a)
A
b)
B
c)
C
d)
D
62.
The largest group of organisms found in a food web would be:
a)
Primary Consumers
b)
Producers
c)
Decomposers
d)
Tertiary Consumers
63.
This diagram shows the amount of energy that moves from one feeding level to another in a food web.
a)
Energy Pyramid
b)
Food Web
c)
Ecosystem
d)
Food Chain
64.
A secondary consumer 
a)
eats primary consumers
b)
eats producers
c)
eats plants
65.
Pick the best name for the picture.
a)
Food Web
b)
Food Chain 
c)
Ecosystem
d)
Habitat
66.
What is the definition of the word consumer?
a)
An animal that eats only plants
b)
An animal that eats other animals
c)
An organism that obtains energy by feeding on other organisms.
d)
The transfer (movement) of energy.
67.
What is the definition of the word producer?
a)
An organism that can make its own food.
b)
An organism that obtains energy by feeding on other organisms.
c)
An animal that eats only plants
d)
An animal that eats other animals
68.
What is the definition of the word carnivore?
a)
An organism that obtains energy by feeding on other organisms.
b)
An animal that eats only plants
c)
An animal that eats other animals
d)
An animal that eats both plants and animals
69.
What is the definition of the word omnivore?
a)
An animal that eats only plants
b)
An animal that eats both plants and animals
c)
An animal that eats other animals
d)
An organism that can make its own food.
70.
What is the definition of a food chain?
a)
An animal that eats only plants
b)
A series of steps in which organisms transfer (move) energy by eating and being eaten.
c)
The transfer (movement) of energy.
d)
Shows what eats what and consists of many food chains in an ecosystem
71.
What is the definition of the word herbivore?
a)
An organism that obtains energy by feeding on other organisms.
b)
An animal that eats only plants
c)
An animal that eats other animals
d)
An animal that eats both plants and animals
72.
What is the definition of the word decomposer?
a)
Shows what eats what and consists of many food chains in an ecosystem
b)
The transfer (movement) of energy.
c)
An animal that eats other animals
d)
An organism that breaks down wastes and dead organisms.
73.
Pick the best name for the picture.
a)
Food Web
b)
Food Chain 
c)
Ecosystem
d)
Habitat
74.

Autotrophs--The bottom trophic level where all organisms produce their own food, usually by photosynthesis.

a)

Trophic Levels

b)

Producers

c)

Ominvores

d)

Herbivores

75.

The level in an Ecological pyramid that includes all the organisms that share the same place in a food chain.

a)

Trophic Levels

b)

Toxic Levels

c)

KeKe Levels

d)

Environmental Systems

76.

Herbivores--The second trophic level where herbivores eat the primary producers.

a)

Detritivores

b)

Autotrophs

c)

Producers

d)

Primary Consumers

77.

The third trophic level where the animals eat herbivores.

a)

Abiotic Factor

b)

Biotic Factor

c)

Secondary Consumer

d)

Secondary Producer

78.

The fourth trophic level where animals eat secondary consumers or below.

a)

Herbivore

b)

Autotroph

c)

Tertiary Consumer

d)

Tertiary Producer

79.

Only 10% of the energy is passed on from one trophic level to the next. 90% is lost as heat due to cellular respiration or waste.

a)

Tertiary Consumer

b)

Biotic Factor

c)

Abiotic Factor

d)

10% Rule

80.

Parts of an ecosystem that are living or deal with the living. Examples include producers, consumers, decomposers, predation, disease, competition, parasitism, and symbiosis.

a)

Abiotic Factors

b)

Biotic Factors

c)

Community

d)

Population

81.

Parts of an ecosystem that are not living. Examples: water, soil, sunlight, temperature, altitude.

a)

Detritivores

b)

Herbivores

c)

Biotic Factors

d)

Abiotic Factors

82.

The flow of nitrogen from the atmosphere to the soil, to plants, to animals and then back to the soil or back into the atmosphere.

a)

Nitrogen Cycle

b)

Carbon Cycle

c)

Trophic Cycle

d)

Abiotic Cycle

83.

The flow of carbon from the atmosphere to plants, to animals to the soil and back into the atmosphere.

a)

Bi-Cycle

b)

Nitrogen Cycle

c)

Carbon Cycle

d)

Abiotic Cycle

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