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Unit 9 Ecology Review

Total questions: 39

Worksheet time: 42mins

Name
Class
Date
1.

Put this food chain in the correct order

a)

Grass

b)

Rabbit

c)

Snake

d)

Hawk

1)
2)
3)
4)
2.

What organism is missing from this food chain?

Shrub -> (a)   -> Insect Eating Bird -> Hawk

3.
Question Image

Match each organism with the correct trophic level

a)

Producer

1.

Grass

b)

Primary Consumer

2.

Squirrel

c)

Secondary Consumer

3.

Insect Eating Bird

d)

Apex Predator

4.

Mountain Lion

e)

Decomposer

5.

Bacteria

4.
How much energy is available to be passed on to the next trophic level in an ecosystem?
a)
100%
b)
10%
c)
50%
d)
75%
5.
Non living factor in an ecosystem (rocks, water, air)
a)
biotic
b)
organism
c)
humus
d)
abiotic
6.
A measure of the number of different species in an ecosystem
a)
biodiversity
b)
species eveness
c)
species eveness
d)
ecosystem diversity
7.
Use the diagram to answer the question.
The trout is a source of food for the human and the eagle. When there are more than one organism vying for the same source we call this____?
a)
Population
b)
Resources
c)
Community
d)
Competition
8.

What is a population?

a)

One individual member of a species

b)

a group of individuals of the same species that live in the same area

c)

a community of different species and their environment

9.

Honey guide birds alert and direct badgers to bee hives. The badgers then expose the hives and feed on the honey first. Then, the honey guide birds eat as well.

a)

symbiosis

b)

parasitism

c)

mutualism

d)

commensalism

10.

Tapeworms reside in human intestine and take nutrients from the human

a)

symbiosis

b)

parasitism

c)

mutualism

d)

commensalism

11.

The ecological role an organism performs in their specific environment is considered the organism's...

a)

Habitat

b)

Population

c)

Biome

d)

Niche

12.

The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?

a)

Grasses and ants

b)

Ants and grasshoppers

c)

Grasshoppers and Texas Cottonmouths

d)

Texas cottonmouths and red shouldered hawks

13.
What are plants called in a food chain?
a)

Producers /Autotrophs

b)

Consumers /Heterotrophs

c)

Decomposers

d)

Scavengers

14.

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.

15.

What happens to the amount of available energy in the pyramid as it moves up through the different levels?

a)

it increases

b)

it decreases

c)

it remains the same

16.

Match the following

a)

Decomposer

1.

This is an organism that breaks down and gains nutrients from dead organisms.

b)

Predator

2.

This is an animal that lives by preying on other animals.

c)

Producer

3.

This is an organism that supplies matter and energy, also known as an autotroph.

d)

Consumer

4.

This is an organism that relies on other organisms for its food and energy supply; heterotroph

e)

Parasite

5.

This is an organism which feeds on, but usually does not kill, a larger organism

17.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
18.
What converts some atmospheric nitrogen into nitrates that organisms can use?
a)
Sun
b)
Rain
c)
Thunder
d)
Lighting
19.
Animals obtain the nitrogen they need directly from the
a)
soil in their habitat
b)
air they breathe
c)
plants they eat
d)
bacteria living within them
20.
Growing legumes such as alfalfa or soy beans increases
a)
denitrification
b)
nitrogen fixation
c)
ammonification
d)
ammonium oxidation
21.
Plants and animals cannot use nitrogen directly from the air.
a)
True
b)
False
22.
What converts nitrogen into a useable form for plants and animals?
a)
bacteria
b)
fungi
c)
rain
23.
How nitrogen is "fixed" into useable form for plants...
a)
through action of bacteria only
b)
through lightning only
c)
through action of bacteria & lightning
d)
through photosynthesis
24.
Organisms require nitrogen to make which of the following?
a)
glucose and starch
b)
lipids and nucleic acids
c)
proteins and nucleic acids
d)
carbohydrates and proteins
25.
What is happening at 1?
a)
respiration: releasing CO2
b)
decomposing CO2 in the soil
c)
photosynthesis: absorbing CO2
d)
turning CO2 from the atmosphere into organic molecules
26.
Where is a lot of the CO2 located on earth?
a)
space
b)
absorbed in the ground
c)
in the atmosphere acting as a greenhouse gas 
d)
in plants
27.
Which of the following add carbon dioxide to the atmosphere?
a)
volcanoes
b)
combustion of fossil fuels
c)
animal and plant respiration
d)
all of these
28.
In what process is Carbon turned transformed into chemical energy?
a)
Photosynthesis
b)
Respiration
c)
Primary Production
d)
Secondary Production
29.

Which is a true statement?

a)

Humans depend on oxygen, plants depend on carbon dioxide

b)

Plants produce carbon dioxide

c)

Humans depend on carbon dioxide, plants depend on oxygen

d)

Humans don't depend on plants for the air they need

30.

A bee receives nectar from a flower and carries the pollen to other flowers:

a)

predation

b)

parasitism

c)

mutualism

d)

commensalism

31.

What would happen within a few months after the formation of a volcanic island?

a)

pioneer species would grow

b)

no pioneer species would grow

c)

trees and large plants would grow

d)

rich, organic soil would be present

32.

What would be a good example of a primary consumer?

a)

carnivore

b)

detrivore

c)

decomposer

d)

herbivore

33.

Introduced species disrupt ecosystems because they are a/an

a)

Keystone Species

b)

Endemic Species

c)

Invasive Species

d)

Native Species

34.

Which is an example of where primary succession could occur?

a)

a glacier melts and exposes new rocks

b)

natural fire burns a prairie

c)

a corn field is abandoned and left to overgrow

d)

flood covers a piece of land

35.

Mice might grow in population and destroy the community by eating all of the berry bushes if

a)

wolves and snakes were removed from the food web

b)

another predator migrated in to the community

c)

the snake population grew

d)

none of these

36.

These organisms are often not shown in a food chain, but are important for recycling nutrients

a)

producers

b)

decomposers

c)

primary consumers

d)

carnivores

37.

90% of the energy that gets lost as you move up a food pyramid or chain gets lost as

a)

pollution to the environment

b)

heat to the environment

c)

energy for decomposers

d)

gets recycled

38.

Match the following

a)
1.

Predation

b)

2.

Mutualism

c)

3.

Commensalism

d)
4.

Parasitism

39.

What is the carrying capacity of the graph?

a)

around 500

b)

more than 800

c)

less than 300

d)

around 700

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