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The positive interaction between individuals of different species whereby one species is benefited and the other is unaffected is known as:


A) commensalism
B) symbiosis
C) mutualism
D) protocooperation
E) herbivory

F) B) and D)
G) A) and C)

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Light intensity sufficient to allow maximum net photosynthesis is only 10 to 30 percent of full summer sunlight for most green plants.

A) True
B) False

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Describe and explain the edaphic factors that effect vegetation local to your region.

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Edaphic factors refer to the soil charac...

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Which of the following elements is not recycled using a gaseous biogeochemical cycle?


A) oxygen
B) calcium
C) carbon
D) nitrogen
E) hydrogen

F) All of the above
G) A) and E)

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A subdivision of the environment according to the needs and preferences of organisms or groups of organisms is referred to as a/an:


A) sere
B) bioclimatic frontier
C) habitat
D) niche
E) disjunction

F) None of the above
G) C) and E)

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A species of animal or plant that is found in only one region or location and nowhere else in the world is referred to as:


A) cosmopolitan
B) endemic
C) phylum
D) epidemic
E) diploid

F) A) and B)
G) A) and C)

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Nitrogen is gained by the atmosphere by the process of denitrification,which is controlled by an array of soil bacteria

A) True
B) False

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Of and estimated 2 million species of insects,only slightly more than one-third have been identified.

A) True
B) False

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Which of the following elements is found in excessive concentrations in lakes and rivers and causes excessive algal growth?


A) oxygen
B) calcium
C) carbon
D) nitrogen
E) hydrogen

F) A) and D)
G) A) and E)

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Compare and contrast the nature of different types of symbiosis,giving examples.

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Symbiosis is a biological relationship b...

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The process whereby nitrogen is removed from the atmosphere and incorporated into soils is referred to as:


A) denitrification
B) nitrogen fixation
C) denudation
D) outgassing
E) combustion

F) D) and E)
G) B) and C)

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B

The process whereby nitrogen is removed from the soil and returned to the atmosphere is referred to as:


A) denitrification
B) nitrogen fixation
C) denudation
D) outgassing
E) combustion

F) A) and B)
G) C) and D)

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The highest division of higher animal life is referred to as a:


A) species
B) genus
C) phylum
D) polyploid
E) diploid

F) B) and E)
G) A) and B)

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The amount of net carbohydrate remaining after respiration has broken down sufficient carbohydrate to power a plant is the:


A) primary production
B) net primary production
C) biomass
D) gross photosynthesis
E) net photosynthesis

F) A) and B)
G) A) and D)

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What proportion of the Earth's atmosphere is comprised of nitrogen?


A) 24%
B) 35%
C) 49%
D) 78%
E) 87%

F) None of the above
G) A) and E)

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D

A form of self-producing succession resulting from the actions of the plants and animals themselves is referred to as:


A) equilibrium succession
B) old-field succession
C) secondary succession
D) primary succession
E) autogenic succession

F) A) and E)
G) A) and B)

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Of the total carbon available,in which of the following pools would you find the most carbon?


A) oceans
B) atmosphere
C) carbonate sediments
D) hydrocarbon
E) soils

F) All of the above
G) A) and D)

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C

One of many stages in the progression of succession is referred to as a/an:


A) sere
B) bioclimatic frontier
C) habitat
D) niche
E) disjunction

F) B) and C)
G) D) and E)

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Which of the following is not one of the factors that acts to keep the spread of a species in check?


A) The specie's spread may be limited by continued dispersal of individuals
B) The specie's spread may be limited by a variety of climatic variations
C) The specie's spread msy be limted by parasites
D) The specie's spread may be limited by disease
E) The limited distribution of another species upon which the initial species is dependent

F) D) and E)
G) A) and B)

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Using an annotated diagram,describe the general operation of the nitrogen cycle.Explain the role of nitrogen fixation and denitrification in the cycle.

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The nitrogen cycle is a biogeochemical p...

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