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Populations And Communities Part 1
Test Description: Part 1
Instructions: Answer all questions to get your test result.
1) The struggle between organisms to survive as they attempt to use the same limited resource.
A
competition
B
mutualism
C
adaptations
D
predation
2) All the members of one species in a particular area.
A
population
B
predation
C
mutualism
D
community
3) The nonliving parts of an ecosystem.
A
abiotic factors
B
limiting factors
C
biotic factors
D
predation
4) A symbiotic relationship in which both species benefit.
A
parasitism
B
commensalism
C
mutualism
D
predation
5) The largest population that an environment can support.
A
carrying capacity
B
adaptation
C
limiting factor
D
comunity
6) The community of organisms that live in an area, along with their nonliving surroundings.
A
population
B
community
C
species
D
ecosystem
7) A group of organisms that are physically similar and can reproduce with each other to produce fertile offspring.
A
ecosystem
B
species
C
community
D
population
8) Environmental conditions that prevent populations from increasing.
A
limiting factors
B
biotic factors
C
abiotic factors
D
adaptations
9) A symbiotic relationship in which one species benefits and the other species is neither helped nor harmed.
A
predation
B
commensalism
C
parasitism
D
mutualism
10) All the different populations that live together in an area.
A
ecosystem
B
species
C
community
D
population
11) The living parts of an ecosystem.
A
adaptations
B
biotic factors
C
abiotic factors
D
limiting factors
12) Behaviors and physical characteristics of species that allow them to live successfully in their environment.
A
biotic factors
B
abiotic factors
C
limiting factors
D
adaptations
13) An interaction in which one organism kills and eats another organism.
A
parasitism
B
predation
C
mutualism
D
commensalism
14) If a population is very large or spread out, ecologists use the ____ method to estimate the population size.
A
sampling
B
tabulating
C
guessing
D
counting
15) All the different species living in an area form a ______.
A
community
B
ecosystem
C
population
D
family
16) An organism's specific role in its habitat is called its ____.
A
livelyhood
B
right
C
name
D
niche
17) Every organism has a variety of ____ that enable it to live successfully in its environment.
A
habitats
B
adaptations
C
styles
D
niches
18) Water, sunlight, and oxygen are examples of ____ factors in ecosystems.
A
abiotic
B
biotic
C
carrying
D
limiting
19) Students counted 75 sand crabs in a 5-meter by 3-meter section of a beach. What was the population density of sand crabs in that section?
A
75/15= 5 so the population density is 5 crabs per square meter
B
75/5= 15 so the population density is 15 crabs per square meter
C
75/8=9.375 so the population density is 9.375 crabs per square meter
D
75/3= 25 so the population density is 25 crabs per square meter
20) The entire beach measures 60 meters by 30 meters. Estimate the total population of sand crabs on the entire beach.
A
60*30=1800*25=27,000 so 27,000 crabs.
B
60*30=1800*5=9,000 so 9,000 crabs.
C
60*30=1800*9.375=16,875 so 16,875 crabs.
D
60*30=1800*15=45,000 so 45,000 crabs.
*select an answer for all questions
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