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Ecology Unit Review

Total questions: 45

Worksheet time: 23mins

Name
Class
Date
1.

The diagram above represents relationships in an

ecosystem. What is the primary source of energy in

this environment?

a)

cellular respiration in the plants

b)

energy from minerals in the soil

c)

fossil fuels

d)

solar energy

2.

Five different living organisms are represented below.

Which statement about the organisms represented

above is correct?

a)

All of the organisms are autotrophs.

b)

Only the flowering plant, green heron, and

aquatic plant carry out photosynthesis.

c)

Only the frog, aquatic plant and green heron are

heterotrophs.

d)

Only the flowering plant and aquatic plant are

autotrophs.

3.

What is one of the best ways to represent the

interdependence of all of the organisms in an

ecosystem?

a)

a cell model

b)

a food chain

c)

a diagram of the water cycle

d)

a food web

4.

A stable ecosystem can have high biodiversity

because each species in that ecosystem

a)

occupies a different niche

b)

inhabits a different environment

c)

is part of a different community

d)

lives in a different biosphere

5.

Stability within an ecosystem is achieved partially by

the presence of organisms that break down important

molecules and make them available for other

organisms to use. These organisms are

a)

plants

b)

herbivores

c)

scavengers

d)

decomposers

6.

The diagram below represents an energy pyramid.

Which type of organism could occupy levels B, C,

and D of this energy pyramid?

a)

consumer

b)

producer

c)

autotroph

d)

carnivore

7.

Which human activity most directly causes a

significant increase in the amount of carbon dioxide

in the atmosphere?

a)

growing corn for food

b)

not using products containing plastics

c)

driving cars long distances

d)

planting large numbers of trees

8.

Producers are generally found at the beginning of a

food chain. Which statement best explains why this

is true?

a)

Producers are usually smaller in size than

consumers.

b)

Producers do not rely on other organisms for

food.

c)

There are always more consumers than

producers in food chains.

d)

Consumers are always more complex

organisms than producers.

9.

An invasive species, the spiny water flea, was

recently found in a New York lake. These water fleas

eat zooplankton, a food also consumed by native

fishes. The fleas spread from lake to lake by

attaching to fishing lines, anchor ropes, and boats.

Which statement best describes the effect of the

water flea on the lake?

a)

It will not compete with animals in the local

food chain.

b)

It will feed on organisms that are important

to other species.

c)

The number of water fleas will decrease due to

a lack of food.

d)

There will be no effect on native species in the

lake.

10.

What is the term for each step in the transfer of energy and matter within a biological community?

a)

Trophic level

b)

food web

c)

food chain

d)

energy path

11.

What is not a form of symbiosis?

a)

Parasatism

b)

mutualism

c)

commensalim

d)

nonalism

12.

Study of interactions between organisms and their environment

a)

Niche

b)

Ecology

c)

Community

d)

Environment

13.

Non-living factor that affects an ecosystem

a)

Biotic Factor

b)

Abiotic Factor

c)

Biome

d)

Food Chain

14.

Living factor that affects an ecosystem

a)

Abiotic Factor

b)

Biotic Factor

c)

Biome

d)

Ecosystem

15.

What form of symbiosis is this?

a)

Parasatism

b)

Commensalism

c)

Mutualism

d)

Nonalism

16.

Consumer that eats plants

a)

Carnivores

b)

Herbivores

c)

Omnivores

17.

In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?

a)

20%

b)

90%

c)

10%

d)

5%

18.

An organism that eats both animals and plants

a)

Herbivore

b)

Omnivore

c)

Carnivore

d)

Producer

19.

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

a)

Invasive Species

b)

Mutualism

c)

Commensalism

d)

Nitrogen fixation

20.

a relationship between two in which one species, the predator, feeds on the other species, the prey

a)

Chemosynthesis

b)

Predation

c)

Cellular Respiration

d)

Commensalism

21.
Living things in the environment are known as _______________.
a)
Biomes
b)
Abiotic Factors
c)
Biotic Factors
d)
Minerals
22.
A single living thing that obtains food, water, and shelter to live, grow, and reproduce in its habitat is _________________.
a)
A population
b)
An organism
c)
A molecule
d)
A community
23.
True or False. All living organisms in an ecosystem are considered abiotic factors
a)
true
b)
false
24.
What type of succession comes when a community has never been colonized?
a)
Primary succession
b)
Secondary succession
c)
Tertiary succession
d)
Symbiosis succession
25.
What is an example of a heterotroph?
a)
Pine tree
b)
Sun flower
c)
Slug
d)
The Sun
26.
Precipitation and evaporation are important components of the
a)
nitrogen cycle
b)
carbon cycle
c)
water cycle
d)
All of the above
27.
The paths of water, carbon, nitrogen, and phosphorus pass from the nonliving environment to living organisms and back to the nonliving environment in closed circles called
a)
living cycles
b)
environcycles
c)
biogeochemical cycles
d)
None of the above
28.

The process shown in the diagram is known as

a)

competitive exclusion.

b)

succession.

c)

symbiosis.

d)

oligotrophy.

29.

The arrows on the food chain represent:

a)

Organism with higher biomass/energy

b)

The organism that is getting eaten

c)

The direction of energy flow

d)

More evolved organisms

30.

When Yellowstone National Park was created in the late 1800s, wolves were on the decline. The last wolves in Yellowstone were killed in 1926, but in the 1800s, there were between 100- 160 wolves in the park. In 1995, gray wolves were reintroduced to the park. Using what you know about populations, predict the growth of the wolves on the graph below.

a)
b)
c)
d)
31.
The ability of a living thing to get bigger is known as _______________.
a)
Development
b)
Growth
c)
Adaptation
d)
Response
32.
A/An ____________is the smallest unit of life.
a)
atom
b)
stimulus
c)
cell
d)
DNA
33.
The ability of an organism to create offspring is ___________________________________.  
a)
reproduction
b)
evolution
c)
development
d)
growth
34.
To maintain stable internal conditions is  __________________________________.
a)
growth
b)
adaptation
c)
homeostasis
d)
development
35.
Type of reproduction that produces two genetically identical offspring from one parent is _________________.
a)
Sexual
b)
Asexual
c)
reproduction
d)
homeostasis
36.
A reaction to a stimulus is a ______________.
a)
hiccup
b)
response
c)
metabolism
d)
homeostasis
37.
Every organism must pass on its ________________, stored in DNA.
a)
metabolism
b)
response
c)
growth
d)
genetic code
38.
_________________is a signal to which a living thing responds.
a)
Stimulus
b)
Reaction
c)
Development
d)
Homeostasis
39.

Reproduction that involves cells from two parents uniting to produce the first cell of a new organism.

a)

Asexual

b)

Sexual

c)

Budding

d)

Division

40.

Maintaining a stable internal environment is called

a)

homeostasis

b)

equilibrium

c)

balance

d)

evenness

41.

Identify the characteristic: Green plants produce their own food through the process of photosynthesis.

a)

All living things use energy

b)

All living things contain cells

c)

All living things maintain homeostasis

d)

All living things grow

42.
Fire is living because it has 6 of the 8 characteristics of life. 
a)
True 
b)
False
43.

Organisms, such as bacteria, are ______________ which means they consist of only a single cell.

a)

unicellular

b)

multicellular

c)

autotrophic

d)

heterotrophic

44.
bio means:
a)
life
b)
two
c)
death
d)
study
45.
This root word means study or "the study of"
a)
-sci-
b)
-ology-
c)
-mem-
d)
-graph-

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