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Ecology S137

Total questions: 47

Worksheet time: 31mins

Name
Class
Date
1.
What is the original source of almost all energy in most ecosystems?
a)
carbohydrates
b)
sunlight
c)
water
d)
carbon
2.
What is the term for each step in the transfer of energy and matter within a biological community?
a)
energy path
b)
food web
c)
trophic level
d)
food pyramid
3.
What is an heterotroph? 
a)
An organism that can produce its own form of energy (via the Sun) 
b)
An organism that consumes only plants for energy
c)
Various organisms that consume other organisms for energy
d)
An organism that decomposes other organisms 
4.
What are the plants in this picture? 
a)
Heterotrophs 
b)
Autotrophs
c)
Carnivores 
d)
Herbivores 
5.
Different populations living and interacting with each other in the same area
a)
Biome
b)
Ecosystem
c)
Community
d)
Niche
6.
The non-living part of an ecosystem
a)
Ocean
b)
Lava Flow
c)
Birds
d)
Abiotic
7.
The study of how living things interact with one another and with their environment.
a)
Biology
b)
Lithology
c)
Ecology
d)
Farmacology
8.
which symbiosis is this 
a)
parasitism 
b)
mutualism
c)
commensalism
d)
nonalism 
9.
symbiotic relationship in which both organisms benefit
a)
competition
b)
Mutualism
c)
nitrogen fixation
d)
energy pyramid
10.
The amount of energy that usually transfers from one trophic level to the next...
a)
10%
b)
20%
c)
80%
d)
50%
11.
An illustration that uses arrows to show the many possible directions in which matter and energy can pass through the organisms in an ecosystem.
a)
Food chain
b)
Food web
c)
Energy Pyramid
d)
Succession Map
12.
Water temperature would be an example of ...
a)
A biotic factor
b)
An abiotic factor
13.
The general name for organisms like animals and fungi that get their energy from eating other organisms.
a)
Producers
b)
Consumers
c)
Detritivores
d)
Carnivores
14.
An organism at the second trophic level would be considered a...
a)
Top carnivore
b)
Producer
c)
Herbivore
d)
Carnivore
15.
In this food web, what is the grasshopper?
a)
producer
b)
tertiary consumer
c)
secondary consumer
d)
primary consumer
16.
What is commensalism?
a)
a symbiosis where one species is helped and the other is harmed
b)
a symbiosis where one species is helped and the other is neither helped nor harmed
c)
a symbiosis where both species are helped
d)
a symbiosis between 2 or more organisms
17.
Is this picture an example of a mutualistic symbiosis?
a)
Yes
b)
No
18.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
19.
which of the following is NOT biotic?
a)
a rotting log
b)
soil
c)
bacteria in our feces
d)
fungus growing on a tree
20.
Which of the following lists the levels of organization in the enviroment from complex to simple?
a)
Biosphere, ecosystem, biome, community
b)
Organism, population, community, ecosystem, biome, biospere
c)
biosphere, biome, ecosystem,community, population, organism
d)
organ system, organ, tissue, cell
21.
which of the following best describes all of the lob lolly pine trees in a particular area of the forest?
a)
organism
b)
population
c)
community
d)
ecosystem
22.
What do the arrows in a food web represent?
a)
equals
b)
it points towards the organism that is being eaten
c)
yeilds or makes
d)
it points towards the organism that is receiving energy from what it has eaten
23.
Use the following food chain to answer this question
Grass--> Insects--> Shrews-->Owl
What would happen if all the insects were to be eliminated?
a)
The grass would decrease and the shrews would increase
b)
the grass would decrease and the shrews would decrease
c)
the grass would increase and the shrews would decrease
d)
the grass would increase and the shrews would increase
24.
What do we call the maximum number of individuals that can survive in an ecosystem based on the resources that are available?
a)
Limiting Factors
b)
Carrying Capacity
c)
Population Density
d)
Emigration
25.
What are the two main ways that a population can decrease?
a)
Births and Emigration
b)
Births and Immigration
c)
Deaths and Emigration
d)
Deaths and Immigration
26.

What will a graph look like when death rate equals birth rate?

a)

Increasing

b)

Descreasing

c)

Staying the same

d)

Increasing and then Decreasing

27.

What do we call the factors that determine carrying capacity?

a)

limiting

b)

abiotic

c)

biotic

d)

population

28.

What will happen if a population grows larger than the carrying capacity of its environment?

a)

death rate may rise

b)

birth rate may rise

c)

death rate may fall

d)

immigration rate may increase

29.

This graph shows the average number of rabbits any coyotes in an area over time. If the rabbit population increased again, what would then happen to the coyote population?

a)

The coyote population would increase

b)

The coyote population would decrease

c)

The coyote population would stay the same

d)

The coyote population would become extinct

30.

When organisms move out of the population this is known as

a)

emigration

b)

abandonment

c)

immigration

d)

succesion

31.

What must occur in a population for it to grow?

a)

The birthrate becomes higher than the death rate

b)

The birthrate stays the same and the death rate increases

c)

The birthrate become lower than the death rate

d)

The birthrate and the death rate remain the same

32.

When individuals in a population reproduce at a constant rate, it is called

a)

logistic growth

b)

growth density

c)

exponential growth

d)

multiple growth

33.

Each of the following is a density-dependent limiting factor EXCEPT

a)

competition

b)

seasonal cycles

c)

crowding

d)

disease

34.

Which of the following is a density-independent limiting factor?

a)

earthquake

b)

disease

c)

emigration

d)

parasitism

35.

A disease resulting in the deaths of one third of a dense population of bats in a cave would be a

a)

density-dependent limiting factor

b)

result of exponential growth

c)

density-independent limiting factor

d)

nutrient-limiting factor

36.
Which organism in this diagram has the highest DDT concentration?
a)
Zooplanktons
b)
small fish
c)
large fish
d)
Fish-eating birds
37.
The process when concentrations of a harmful substance increases in organisms at higher trophic levels in a food chain or food web.
a)
Biomagnification
b)
Predation
c)
Extinction
d)
Accumulation
38.
Which process takes Carbon Dioxide from the air and converts it into a form of carbon used by living things?
a)
Precipitation
b)
Photosynthesis
c)
Respiration
d)
Bioremdiation
39.
When nitrogen gas is turned in to a form that plants and animals can use is called 
a)
Combustion
b)
Photosynthesis
c)
Decomposition
d)
Nitrogen Fixation
40.

Carbon dioxide is added to the atmosphere by

a)

Burning fossil fuels

b)

Cellular respiration

c)

Both are correct

41.
The nitrogen found in the atmosphere is not in a form that plants or animals can use.  What converts it into a usable form?
a)
Bacteria
b)
Photosynthesis
c)
Decomposition of organisms
d)
Fungi
42.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
This is not a correct diagram of any cycle.
43.
The process represented by arrow 2 is _
a)
transpiration
b)
evaporation
c)
condensation
d)
precipitation
44.
What is A?
a)
Evaporation
b)
Condensation
c)
Precipitation
d)
Runoff
45.
How do animals get the carbon they need?
a)
decomposing
b)
combustion
c)
eating plants 
d)
breathing it in
46.
What role do decomposers play in the carbon cycle?
a)
absorb carbon dioxide 
b)
release carbon dioxide into atmosphere
c)
return carbon into the soil
d)
combustion
47.

By what process does bacteria convert usable form of nitrogen back into atmospheric nitrogen (N2)?

a)

Dentrification

b)

Nitrogen Fixation

c)

Decomposition

d)

Assimilation

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