Name:________________________________ Date:_______________ Block: __________
Unit 5 Exam (130 points)
Multiple choice (use the scantron to answer questions 1-28)
1. Water is lost to the abiotic parts of the biosphere from the biotic parts by the process of _____.
a. precipitation
b. photosynthesis
c. transpiration
d. infiltration
2. Nitrogen is released to the abiotic parts of the biosphere from the processes of death and _____.
a. decay by bacteria
b. infiltration of groundwater
c. runoff
d. lightning
3. Carbon dioxide in the atmosphere enters the biotic parts of the biosphere through _____.
a. burning of forests
b. photosynthesis
c. combustion of fossil fuels
d.all of these
4. Some birds are known as honey guides because they may be followed by humans to wild
beehives. When the humans take honey from the hives, the birds are able to feast on the honey
and bees, too. This type of relationship can best be described as _____.
a. parasitism
b. commensalism
c. mutualism
d. symbiosis
5. Sea stars live in saltwater ecosystems. Some species live in shallow tidal pools, while others live
in the deepest parts of the oceans. This is a description of the _____ of sea stars.
a. habitat
b. community
c. niche
d .none of these
6. Cougars are predators that often eat weakened or diseased animals. This is a description of
the _____ of cougars.
a. habitat
b. community
c. niche
d. none of these
7. An ecologist who studies how several species in an area interact among each other and with the
abiotic parts of the environment is interested in the biological organization level called
a(n) _____.
a. organism
b. population
c. community
d. ecosystem
8. An ecologist who studies how several species in an area interact is interested in the biological
organization called a(n) _____.
a. organism
b. population
c. community
d. ecosystem
9. Referring to the figure above, suppose 10 000 units of energy are available at the level of the
grasses. What is the total number of energy units lost by the time energy reaches the coyote?
a. 90 units c
b. 990 units
c. 9900 units
d. 9990 units
10. Referring to the figure above, as matter and energy move from grasses to coyotes, the amount of
available energy _____.
a. increases
b. decreases then increases
c. decreases
d. increases or decreases but population size remains the
same
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Name:________________________________ Date:_______________ Block: __________
11. Referring to the previous figure, the relationship between cats and mice could best be described
as _____.
a. predator-prey
b. scavenger-carrion
c. parasite-host
d. consumer-producer
12. Referring to the previous figure, the coyotes would be considered _____.
a. herbivores
b. third-order consumers
c. second-order consumers
d. decomposers
13. Referring to the previous figure, energy flows from _____.
a. coyotes to grasses
b. cats to mice
c. mice to cats
d. coyotes to cats
14. Where is the biosphere in Figure 2-4?
a. core
b. Mantle
c. Upper mantle
d. Earth’s crust
Figure 2-4
15. Which of the following is an abiotic factor in the environment?
a. mouse
b. butterfly
c. rock
d. tree
16. The group of animals in Figure 2-6 is an example of what?
a.
b.
c.
d.
community
Ecosystem
Population
biosphere
Figure 2-6
17. In the energy pyramid shown, which level has the
smallest number of organisms?
a. fox
c.
grasshoppers
b. birds d.
grass
18. Which organism shown in the pyramid shown
receives the highest percentage of energy from the
sun?
a. fox
b. birds
c.
d.
grasshoppers
grass
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Name:________________________________ Date:_______________ Block: __________
19.
The organisms growing on the log in Figure 2-8 are ____?
a.
b.
c.
d.
producers
Autotrophs
Carnivores
decomposers
Figure 2-8
20.
What type of ecosystem is shown in Figure 2-11?
a.
b.
c.
d.
terrestrial
Population
Aquatic
abiotic
.
Figure 2-11
21.
The organism shown in Figure 2-12 is involved in which type of symbiosis?
a.
b.
c.
d.
mutualism
Commensalism
Parasitism
predatorism
Figure 2-12
22.
Energy is released from ATP when the bond is broken between _____.
a. two phosphate groups c.
ribose and a phosphate group
b. adenine and ribose
d.
adenine and a phosphate group
23.
Cells store energy when _____.
a. the third phosphate group breaks off from an ATP molecule
b. they break down sucrose to glucose and fructose
c. a third phosphate group is bonded to an ATP molecule
d. ions are released into the bloodstream
24.
The energy in glucose cannot be released by _____.
a. glycolysis
b. burning
c. respiration
d. photosynthesis
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Name:________________________________ Date:_______________ Block: __________
25.
Which of the diagrams in Figure 9-2 best show how energy is produced in a cell?
a.
b.
c.
d.
A
B
C
D
Figure 9-2
26.
A population that grows until it reaches its carrying capacity usually has the shape of an _____.
a. I
b. J
c. S
d. M
27.
Density-independent factors are limiting factors whose effects are _____.
a. confined to the habitat of the population
b. determined by the degree of competition for resources
c. not influenced by population densities
d. determined by the difference between birthrate and population density
28.
For a particular species, the carrying capacity is the maximum number of individual organisms
that _____.
a. the species could reach in a given time period if all the offspring survive and reproduce
b. could be supported by a given environment indefinitely
c. are in their post-reproductive years
d. could be supported by any environment over a period of one year
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Name:________________________________ Date:_______________ Block: __________
Fill in the blanks (each word will be used only once)
Abiotic 41
Carrying capacity 43
Density dependent 44
Consumers 30
Ecosystem 32, 42
Biosphere 31
Decomposers 40
Energy 39
Biotic 35
Foodweb 34
Decomposition 37
Exponential 45
Heat 38
Mutualism 36
Symbiosis 33
Water cycle 29
J 46
29. The ____________________ consists of evaporation, precipitation, transpiration, runoff, and
respiration.
30. Omnivores, carnivores, herbivores, scavengers, and decomposers are all ____________________.
31. biotic factors, and abiotic factors make up the ____________________.
32. Organism, population, and community make up the ____________________.
33. Parasitism, commensalism, and mutualism are examples of ____________________.
34. Trophic level and food chain are parts of a ____________________.
35. In a pond ecosystem, ducks, mosquitoes, pond plants, and frogs are ____________________ factors.
36. Both the alga and the fungus are benefited from their relationship in a lichen. This relationship is one
of ____________________.
37. Water, carbon, and nitrogen are released back into the atmosphere during ____________________.
38. Energy that passes through a food chain is lost to the environment as ____________________.
39. To explain and show how the amount of living material at each trophic level of a food chain changes,
you could use a pyramid of ____________________.
40. Before plants can reuse many organic materials, the materials must be broken down by
____________________.
41. Wind, humidity, and rocks are all ____________________ in a terrestrial ecosystem.
42. In ecological classification, the next smallest level after the biosphere is the ____________________.
43. instead of growing explosively, population growth tends to level off because the population reaches
the ____________________ of a particular environment.
44. Food, water, or shelter could be ____________________ factors on the growth of a population.
45. A population of bacteria that doubles its size every 20 minutes exhibits ____________________
growth
46. A(n) ____________________-shaped curve describes the tendency of a population to grow without
limit to its size.
Match each item with the correct statement below.
a. mutualism
h.
food web
b. biosphere
i.
food chain
c. ecology
j.
commensalism
d. biological community k.
scavenger
e. decomposer
l.
heterotroph
f. parasitism
m.
trophic level
g. habitat
n.
autotroph
47.
___c_____study of how living things relate to each other and to their environment
48.
_a_______relationship between organisms in which both organisms benefit
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Name:________________________________ Date:_______________ Block: __________
49.
____h____network of interconnected food chains
50.
____j____relationship between organisms in which one organism benefits and the
other is neither harmed nor benefited
51.
____b____layer of Earth that supports life
52.
53.
____k____feeds on dead organisms
_____i____simple model for showing how matter and energy move through an
ecosystem
54.
_____d____group formed by several populations
55.
_____n____manufactures food using energy from the sun or from chemical
compounds
56.
_____f___relationship between organisms in which one organism benefits at the
expense of another
57.
58.
____g____place where an organism spends its life
____m___step in the passage of energy and matter through an ecosystem
59. ____l____obtains energy and nutrients from autotrophs
60.
____e____breaks down dead organisms
Short answer:
61.
Draw and label a diagram of the nitrogen cycle. (10 points)
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