NEW
Font size
S
M
L
XL
WorksheetsEcology Unit Review
Total questions: 64
Worksheet time: 32mins
Name
Class
Date
1.
An organism that creates its own food (aka a producer)
a)
autotroph
b)
heterotroph
c)
decomposer
d)
omnivore
2.
Process by which plants and other organisms use sunlight to synthesize food from CO2 and water
a)
Cellular respiration
b)
photosynthesis
c)
energy transfer
d)
food web
3.
An organism that relies on other organisms for its energy and food supply (aka a consumer)
a)
autotroph
b)
producer
c)
heterotroph
d)
biogeochemical cycle
4.
Organism that breaks down and obtains energy from dead organic matter
a)
omnivore
b)
carnivore
c)
herbivore
d)
decomposer
5.
An organism that obtains energy by eating both animals and plants
a)
carnivore
b)
omnivore
c)
producer
d)
herbivore
6.
Pathway by which chemical substances moves through both the biosphere, lithosphere, atmosphere, and hydrosphere of the Earth
a)
biogeochemical cycles
b)
energy pyramid
c)
food chain
d)
food web
7.
Process that releases energy by breaking down glucose and other food in the presence of oxygen
a)
photosynthesis
b)
cellular respiration
c)
energy flow
d)
fermentation
8.
A graphical representation designed to show the biomass at each trophic level in a given ecosystem
a)
food web
b)
energy pyramid
c)
food chain
d)
energy chain
9.
An ecosystem possesses...
a)
only living components
b)
only non-living components
c)
both living and non-living components
d)
none of the above
10.
Which phrase best describes the focus of ecology?
a)
individual organisms
b)
individual cells
c)
interactions among cells
d)
interactions among organisms
11.
Giant pandas eat bamboo almost exclusively. For the reason giant pandas are an example of a(n)
a)
carnivore
b)
omnivore
c)
herbivore
d)
producer
12.
Which of the following is NOT an example of a consumer?
a)
carnivore
b)
herbivore
c)
producer
d)
omnivore
13.
What flows through an ecosystem and does NOT cycle?
a)
Water
b)
Carbon
c)
Energy
d)
Nitrogen
14.
When numerous food chains link to each other in an ecosystem, it is known as a(n)...
a)
food chain
b)
food web
c)
trophic pyramid
d)
food cluster
15.
The trophic structure of an ecosystem can be summarized in the form of a(n)...
a)
ecological pyramid
b)
energy network
c)
climax schematic
d)
trophic level chart
16.
Ecological pyramids are built from a...
a)
pyramid of numbers
b)
pyramid of biomass
c)
pyramid of energy
d)
all of these options
17.
It is generally stated that only about __ % of the energy available at one trophic level is incorporated into the tissues of animals at the next level.
a)
25%
b)
19%
c)
10%
d)
72%
18.
Given enough time, all water eventually returns to the ________
a)
lakes & ponds
b)
atmosphere via transpiration
c)
atmosphere via evaporation
d)
oceans
19.
In the carbon cycle, both terrestrial and aquatic organisms exchange ______ with the atmosphere
a)
Glucose
b)
CO2
c)
Oxygen
d)
Methane
20.
Respiration releases carbon dioxide, the molecule needed for photosynthesis
a)
True
b)
False
21.
The relationship between ______ and cellular respiration should be kept in mind when discussing the carbon cycle
a)
Photosynthesis
b)
trophic levels
c)
food pyramids
d)
fermentation
22.
Plants cannot incorporate nitrogen into organic compounds and therefore depend on ______ to make nitrogen available to them
a)
oxygen
b)
bacteria
c)
humans
d)
viruses
23.
Algae are producers in aquatic ecosystems
a)
True
b)
False
24.
All autotrophs use energy from the sun to produce sugars and other organic compounds
a)
True
b)
False
25.
Where is energy the highest in this food chain: grass → rabbit → fox → bacteria
a)
bacteria
b)
fox
c)
rabbit
d)
grass
26.
In the food chain: grass → rabbit → fox → bacteria, the fox is a...
a)
producer
b)
secondary consumer
c)
tertiary consumer
d)
primary consumer
27.
The tertiary consumer is equivalent to the _____ trophic level.
a)
1st
b)
2nd
c)
3rd
d)
4th
28.
An omnivore is a primary consumer if it eats blackberries but it is a secondary consumer if it eats a rabbit.
a)
True
b)
False
29.
According to the 10% rule, if an average of 5000 kg of plant material is consumed by herbivores ____ is converted to primary consumer tissues
a)
50,000
b)
5,000
c)
500
d)
5
30.
Phosphorous is needed for the production of…
a)
ATP
b)
Ocygen
c)
Glucose
d)
CO2
31.
Plants and animals exchange materials through the processes of photosynthesis and respiration. Which of these statements is true about the way these two processes are related?
a)
The products of photosynthesis inhibit respiration.
b)
The products of photosynthesis are also the products of respiration.
c)
The reactants of photosynthesis are also the reactants of respiration.
d)
The product of photosynthesis are the reactants of respiration.
32.
We inhale _____ and exhale ____
a)
oxygen, CO2
b)
CO2, Oxygen
33.
Photosynthesis uses sunlight to convert water and carbon dioxide into
a)
oxygen
b)
glucose
c)
ATP & oxygen
d)
Oxygen & glucose
34.
Photosynthesis is to chloroplasts as cellular respiration is to...
a)
Golgi
b)
Mitochondria
c)
Nucleus
d)
Vacuole
35.
Which is the correct equation for photosynthesis?
a)
6O2 + C6H12O6 + ATP → 6CO2 + 6H20
b)
6CO2 + 6H20 + ATP → 6O2 + C6H12O6
c)
6O2 + C6H12O6 → 6CO2 + 6H20 + ATP
d)
6CO2 + 6H20 → 6O2 + C6H12O6 + ATP
36.
What is one of the reactants (inputs) for cellular respiration?
a)
glucose
b)
water
c)
CO2
d)
energy
37.
What are the products (outputs) for photosynthesis?
a)
sugar & glucose
b)
CO2
c)
Glucose & oxygen
d)
Water & energy
38.
What molecule does aerobic respiration use that anaerobic respiration is missing?
a)
hydrogen
b)
nitrogen
c)
oxygen
d)
carbon
39.
If 2 organisms are both benefited in a relationship, this is what type of symbiosis?
a)
parasitism
b)
commensalism
c)
mutualism
40.
If 1 organism is benefited and 1 organism is harmed, this is what type of symbiosis?
a)
parasitism
b)
mutualism
c)
commensalism
41.
If 1 organism is benefited, and 1 organism is neither harmed nor helped, this is what type of symbiosis?
a)
mutualism
b)
parasitism
c)
commensalism
42.
Which factor causes a population to increase in size?
a)
deaths
b)
emmigration
c)
immigration
d)
carrying capacity
43.
What is the carrying capacity?
a)
the density-dependent effect
b)
the maximum amount of organisms an environment can sustain
c)
innate capacity for increase
d)
none of the above
44.
Which type of growth occurs when a population has unlimited resources and no predators?
a)
logistic growth
b)
exponential growth
c)
population growth
d)
environmental growth
45.
Which type of growth occurs in a realistic population where resources are limited and predators exist?
a)
logistic growth
b)
exponential growth
c)
uniform growth
d)
boom growth
46.
When the desks are arranged in groups in the classroom, the pattern of dispersion is referred to as
a)
clumped
b)
random
c)
uniform
47.
When penguins stand a specific space apart from each other in order to maximize body heat, this is an example of
a)
clumped dispersion
b)
uniform dispersion
c)
ransom dispersion
48.
When is the growth rate of a population “stable”?
a)
When the number of births > deaths
b)
When the number of births < deaths
c)
When the number of births = zero
d)
When the number of births = deaths
49.
A population is best defined as
a)
All the individuals of a species that live in a specific geographical area that can reproduce
b)
all organisms living in one area
c)
The most current census data
d)
all organisms that cannot reproduce in a population
50.
A population that increases 5% every year continually is said to be experiencing
a)
exponential growth
b)
logistic growth
c)
unlimited growth
d)
maximum growth
51.
Which of the following can cause a population crash?
a)
a rise in the carrying capacity for a population
b)
a rise in the emigration rate
c)
a drop in the immigration rate
d)
a drop in the carrying capacity for a population
52.
Exponential growth curves are generally
a)
J-shaped
b)
S-shaped
c)
L-shaped
d)
No shape
53.
Which of the following is a density-dependent factor?
a)
temperature
b)
precipitation
c)
food
d)
natural disasters
54.
Which of the following is a density-independent factor?
a)
water
b)
food
c)
shelter
d)
temperature
55.
Which of the following populations is most likely to go extinct?
a)
a very small population in an unstable environment
b)
a moderate-sized population of r strategists
c)
a large population with lots of genetic variability
d)
all would be equally likely to go extinct
56.
Which survivorship curve represents a species that doesn't care for its young, which have a high infant mortality rate?
a)
Type III
b)
Type II
c)
Type I
57.
What kind of information does a survivorship curve show?
a)
the age at which an organism reproduces
b)
the life history of an individual organism
c)
the age at which each offspring dies
d)
the number of surviving members in a population over time
58.
The mortality (death) rate of organisms following Type II survivorship curve is
a)
Fairly constant throughout life
b)
Higher in post-reproductive years
c)
Lower after organisms are established
d)
Unrelated to age
59.
The following natural events will cause primary succession to occur:
a)
tornado
b)
fire
c)
glacier receeding
d)
tsumani
60.
How does secondary succession differ from primary succession?
a)
Secondary succession has a definite end.
b)
Soil does not have to be replaced in primary succession.
c)
Soil does not have to be replaced in secondary succession.
d)
Pioneer species are not needed in primary succession.
61.
The first organisms to grow after a fire are called the
a)
climax community
b)
succession community
c)
pioneer species
d)
seeds
62.
In ecology, succession refers to:
a)
Balances of power
b)
Survival of the fittest
c)
natural selection
d)
one species being replaced by another
63.
Why does primary succession take longer than secondary succession?
a)
Many fires must add nutrients to the soil before primary succession can take place.
b)
An ecosystem must be established in a previously uninhabited area.
c)
A thick layer of soil must be formed so pioneer species can grow
d)
Animals do not contribute to secondary succession.
64.
The ________ states that no 2 species can occupy the same niche in the same habitat at the same time
a)
community interaction theory
b)
major biome hypothesis
c)
ecological succession postulate
d)
competitive exclusion
Reset
