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Lembar kerjaBiology Unit 2: Ecology
Total soal: 41
Worksheet time: 1hrs 22mins
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Tanggal
1.
All of life on Earth exists in a region known as
a)
All of life on Earth exists in a region known as
b)
a biome
c)
the biosphere
d)
ecology
2.
Groups of different species that live together in a defined area make up a(an)
a)
population
b)
community
c)
ecosystem
d)
biosphere
3.
Autotrophs are organisms that
a)
rely on other organisms for their energy and food supply.
b)
consume plant and animal remains and other dead matter.
c)
use energy they take in from the environment to convert inorganic molecules into complex organic molecules
d)
obtain energy by eating only plants
4.
The series of steps in which a large fish eats a small fish that has eaten algae is a
a)
food web
b)
food chain
c)
pyramid of numbers
d)
biomass pyramid
5.
Which of the following organisms is a decomposer?
a)
fox
b)
Maple tree
c)
earthworm
d)
Warbler
6.
The total mass of living tissue at each trophic level can be shown in a(an)
a)
energy pyramid
b)
pyramid of numbers
c)
biomass pyramid
d)
biogeochemical cycle
7.
Nutrients move through an ecosystem in
a)
biogeochemical cycles
b)
water cycles
c)
energy pyramids
d)
ecological pyramids
8.
In the nitrogen cycle, bacteria that live on the roots of plants
a)
break down nitrogen compounds into nitrogen gas
b)
denitrify nitrogen compounds
c)
change nitrogen gas into plant proteins
d)
change nitrogen gas into ammonia
9.
Which biogeochemical cycle does NOT involve a stage where the chemical enters the atmosphere?
a)
water cycle
b)
carbon cycle
c)
nitrogen cycle
d)
phosphorus cycle
10.
When an ecosystem is limited by a single nutrient that either is scarce or cycles very slowly, this substance is called a(an)
a)
nitrogen compound
b)
organic phosphate
c)
biogeochemical cycle
d)
limiting nutrient
11.
The average, year-after-year conditions of temperature and precipitation within a particular region are its
a)
weather
b)
climate
c)
greenhouse effect
d)
biotic factors
12.
The greenhouse effect causes an increase in
a)
carbon dioxide
b)
temperature
c)
oxygen
d)
water
13.
All the biotic and abiotic factors in a pond form a(an)
a)
biosphere
b)
ecosystem
c)
community
d)
niche
14.
A relationship in which one organism is helped and another organism is neither helped nor hurt is called
a)
mutualism
b)
parasitism
c)
competition
d)
commensalism
15.
A form of symbiosis in which both organisms benefit is called
a)
mutualism
b)
parasitism
c)
commensalism
d)
predation
16.
A type of symbiosis in which one organism benefits and the other is harmed is called
a)
mutualism
b)
parasitism
c)
commensalism
d)
succession
17.
Natural disturbances, such as fires or hurricanes, can result in
a)
commensalism
b)
competition
c)
parasitism
d)
succession
18.
In a tropical rain forest, the dense covering formed by the leafy tops of tall trees is called the
a)
canopy
b)
taiga
c)
niche
d)
understory
19.
Organisms that live near or on the ocean floor are called
a)
parasites
b)
benthos
c)
plankton
d)
mangroves
20.
In the diagram of the ocean below, the feature labeled A is the
a)
open ocean
b)
coastal ocean
c)
trench
d)
estuary
21.
The number of individuals of a single species per unit area is known as
a)
carrying capacity
b)
logistic growth
c)
population density
d)
population growth rate
22.
The movement of individuals into an area is called
a)
demography
b)
carrying capacity
c)
immigration
d)
emigration
23.
The range or area occupied by a population is its
a)
growth rate
b)
geographic distribution
c)
age structure
d)
population density
24.
The graph represents
a)
carrying capacity
b)
exponential growth
c)
logistic growth
d)
limiting factors
25.
The maximum number of organisms of a particular species that can be supported by an environment is called
a)
logistic growth
b)
carrying capacity
c)
exponential growth
d)
population density
26.
If a population grows larger than the carrying capacity of its environment, the
a)
death rate may rise
b)
birthrate may rise
c)
death rate may fall
d)
immigration rate may increase
27.
Density-independent limiting factors include
a)
predation
b)
hurricanes
c)
competition
d)
parasitism
28.
A limiting factor that depends on population size is called a
a)
density-dependent limiting factor
b)
density-independent limiting factor
c)
predator-prey rleationship
d)
parasitic relationship
29.
The scientific study of human populations is called
a)
immigration
b)
emigration
c)
demographic transition
d)
demography
30.
The demographic transition is complete when
a)
population growth stops
b)
the birthrate is greater than the death rate
c)
the death rate begins to fall
d)
the death rate is greater than the birthrate
31.
Which of the following human activities was NOT important in transforming the biosphere?
a)
agriculture
b)
industry
c)
urban development
d)
aqauculture
32.
Civilizations could not develop without
a)
monoculture
b)
hunter-gatherers
c)
agriculture
d)
crop exchange
33.
A resource that cannot be replenished by natural processes is called
a)
common
b)
renewable
c)
nonrenewable
d)
conserved
34.
The conversion of a previously soil-rich area to a sandy desert is called
a)
habitat fragmentation
b)
deforestation
c)
desertification
d)
acid rain
35.
The burning of fossil fuels may cause all of the following EXCEPT
a)
acid rain
b)
global warming
c)
smog
d)
the ozone hole
36.
The sum total of the variety of organisms on Earth is referred to as
a)
ecosystem
b)
biodiversity
c)
forest
d)
agriculture
37.
When land development divides a habitat into isolated “islands” of the original area, the result is called
a)
deforestation
b)
reforestation
c)
magnification
d)
fragmentation
38.
A species that enters an environment where it has not lived before is called a(an)
a)
endangered species
b)
invasive species
c)
threatened species
d)
predator
39.
A species whose population size is declining so rapidly that it could soon become extinct is said to be
a)
nonnative
b)
fragmented
c)
endangered
d)
invasive
40.
The concept of using natural resources at a rate that does not deplete them is called
a)
conservation
b)
sustainable development
c)
reforestation
d)
successful use
41.
Examine the food web below and determine which of the following organisms would accumulate the highest levels of a chlorinated pesticide
a)
hawk
b)
rabbit
c)
frog
d)
grasses
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