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A symbiotic relationship in which both species benefit is a. commensalism. c. predation. b. mutualism. d. parasitism.

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Plants are a. primary producers. c. herbivores. b. primary consumers. d. omnivores.

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 If several species of carnivores are removed from an ecosystem, the most likely effect on theecosystem will be:A. An increase in the kinds of autotrophsB. A decrease in the number of abiotic factorsC. A decrease in stability among populationsD. An increase in the rate of succession

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 If several species of carnivores are removed from an ecosystem, the most likely effect on theecosystem will be:A. An increase in the kinds of autotrophsB. A decrease in the number of abiotic factorsC. A decrease in stability among populationsD. An increase in the rate of succession

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C

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 Coyotes are opportunistic predators that are found throughout most of North America. Theytypically feed on small mammals, insects, and fruits and vegetables. They are known for their dietaryadaptability. The best description of their role in the food web would be:A. An herbivoreB. A carnivoreC. An omnivoreD. A primary producer

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 Coyotes are opportunistic predators that are found throughout most of North America. Theytypically feed on small mammals, insects, and fruits and vegetables. They are known for their dietaryadaptability. The best description of their role in the food web would be:A. An herbivoreB. A carnivoreC. An omnivoreD. A primary producer

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C

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Plants are
a. primary producers.
b. herbivores.
c. primary consumers.
d. omnivores.

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Which of the following descriptions about the organization of an ecosystem is correct?
a. Communities make up species, which make up populations.
b. Populations make up species, which make up communities.
c. Species make up communities, which make up populations.
d. Species make up populations, which make up communities.

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A certain plant requires moisture, oxygen, carbon dioxide, light, and minerals in order to survive. This statement shows that a living organism depends on:

A. Biotic factors

B. Abiotic factors

C. Symbiotic relationships

D. Carnivore-herbivore relationships

answer:B

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The yucca plant releases a strong scent at night when the yucca moth is active.
The yucca moth, attracted by the scent, gathers pollen from the yucca flower. The yucca moth then deposits her eggs and the pollen on another plant. This ensures that the plant will be cross-pollinated and that the yucca moth larvae have a steady food supply. Which relationship does this best illustrate?
A commensalism
B mutualism
C parasitism
D predation

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Which of the following is a biological aspect of an organism’s niche?a. the water in the area  b. amount of sunlight c. the way it gets food d. composition of soil

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Which of the following is a biological aspect of an organism’s niche?a. the water in the area  b. amount of sunlight c. the way it gets food d. composition of soil

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Answer: b

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The total amount of living tissue within a given trophic level is called thea. organic mass.                      c. energy mass.b. trophic mass.                       d. biomass.

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The total amount of living tissue within a given trophic level is called thea. organic mass.                      c. energy mass.b. trophic mass.                       d. biomass.

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Answer: D
A symbiotic relationship in which both species benefit is
a. commensalism.
c. predation.
b. mutualism.
d. parasitism.
Answer: B

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Which of the following is NOT a basic method used by ecologists to study the living world? (a) experimenting (b) animal training (c) modeling (d) observing

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Which of the following is NOT a basic method used by ecologists to study the living world? (a) experimenting (b) animal training (c) modeling (d) observing

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The answer is B.

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Two different populations of birds live in the same area and eat the same types of food. Which most likely describes the relationship between these two populations of birds?
A competition
B mutualism
C parasitism
D predator-prey

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Which of the following is an abiotic factor in an ecosystem?1. Bird2. Tree 3. Rock4. Deer

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Which of the following is an abiotic factor in an ecosystem?1. Bird2. Tree 3. Rock4. Deer

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All of the following are density-dependent factors that limit animal populations EXCEPT

A. weather D. food competition
B. predation E. mortality
C. birthrate
answer : E

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One way that humans could have a positive impact on local environments is to:         A. generate waste products as a result of technological advances                                   B. use resources that are renewable                                 C. increase planting large areas of one crop                     D. increase the use of pesticides

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One way that humans could have a positive impact on local environments is to:         A. generate waste products as a result of technological advances                                   B. use resources that are renewable                                 C. increase planting large areas of one crop                     D. increase the use of pesticides

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Answer= B

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What process produces manyvariations in phenotypes? A independent assortment B asexual reproduction C regeneration D cloning 

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What process produces manyvariations in phenotypes? A independent assortment B asexual reproduction C regeneration D cloning 

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answer: A

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A symbiotic relationship in which both species benefit isa. commensalism. c. predation.b. mutualism. d. parasitism.

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A symbiotic relationship in which both species benefit isa. commensalism. c. predation.b. mutualism. d. parasitism.

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answer : b

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RNA and DNA are which type oforganic compound? A carbohydrate B lipid C nucleic acid D protein 

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RNA and DNA are which type oforganic compound? A carbohydrate B lipid C nucleic acid D protein 

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Answer: C

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Angel was trying to explain carrying capacity to her mother. Which of the followingdescriptions is accurate? Carrying capacity is :A. the maximum number of individuals that an ecosystem can sustain.B. the ability of an environment to accommodate a growing population.C. the greatest number of individuals that an area can sustain over the long term.D. the maximum number of species that can co-exist in an area.

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Angel was trying to explain carrying capacity to her mother. Which of the followingdescriptions is accurate? Carrying capacity is :A. the maximum number of individuals that an ecosystem can sustain.B. the ability of an environment to accommodate a growing population.C. the greatest number of individuals that an area can sustain over the long term.D. the maximum number of species that can co-exist in an area.

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Answer= A

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In the following food chain, which organism is the secondary consumer?grass ------> rabbit -------> snake ------> hawkA. GrassB. RabbitC. SnakeD. Hawk

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In the following food chain, which organism is the secondary consumer?grass ------> rabbit -------> snake ------> hawkA. GrassB. RabbitC. SnakeD. Hawk

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Which organism is most likely to useanaerobic respiration? A bird B moss C tree D yeast

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Which organism is most likely to useanaerobic respiration? A bird B moss C tree D yeast

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anwer: D

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. All of the following are threats to biodiversity EXCEPT
a. biological magnification of toxic compounds.
b. habitat fragmentation.
c. desertification.
d. habitat preservation.

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Each of the following is an abiotic factor in the environment except..

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Each of the following is an abiotic factor in the environment except..

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A) Plant Life
B)Soil Type
C)Rainfall
D)Temperature
Answer is A.

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A word that means the same thing as consumer isa. producer. c. heterotroph.b. autotroph. d. carbohydrate.

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A word that means the same thing as consumer isa. producer. c. heterotroph.b. autotroph. d. carbohydrate.

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Answer: C

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Nitrogen fixation is carried out primarily by:
A. humans
B. plants
C. bacteria
D. consumers
Answer: C
Each of the following is an abiotic factor EXCEPT:
A. plant life
B. soil type
C. rainfall
D. temperature
Answer: A

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Which will reduce competition within a species' population?

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Which will reduce competition within a species' population?

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a. fewer individuals
b. fewer resources
c. higher birthrate
d. higher population density
Answer: D

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Coyotes are opportunistic predators that are found throughout most of NorthAmerica. They typically feed on small mammals, insects, and fruits and vegetables.They are known for their dietary adaptability. The best description of their role in thefood web would be: 

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Coyotes are opportunistic predators that are found throughout most of NorthAmerica. They typically feed on small mammals, insects, and fruits and vegetables.They are known for their dietary adaptability. The best description of their role in thefood web would be: 

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A. An herbivore
B. A carnivore
C. An omnivore
D. A primary producer
Answer: C

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The lowest level of environmental complexity that includes living and nonliving factors is the (a) biome.  (b) community.  (c) ecosystem.  (d) biosphere. 

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The lowest level of environmental complexity that includes living and nonliving factors is the (a) biome.  (b) community.  (c) ecosystem.  (d) biosphere. 

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The answer is C.

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 Which of the following descriptions about the organization of an ecosystem is correct?a. Communities make up species, which make up populations.b. Populations make up species, which make up communities.c. Species make up communities, which make up populations.d. Species make up populations, which make up communities.

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 Which of the following descriptions about the organization of an ecosystem is correct?a. Communities make up species, which make up populations.b. Populations make up species, which make up communities.c. Species make up communities, which make up populations.d. Species make up populations, which make up communities.

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Answer : A

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An animal population decreases from 800 individuals to 600 individuals. Which of the
following could explain this change in population size?
A. The population size of the animal’s predator increased.
B. The emigration rate of the animals from the population decreased.
C. The number of breeding pairs in the animal’s population increased.
D. The number of species competing with the animal for food decreased.
answer : A

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Which statement represents a characteristic of an ecosystem that is not likely to sustain itself? A. The Sun provides the needed energy. B. Energy is transferred from plants to animals. C. There are more consumers than producers. D. There are interactions between biotic and abiotic factors.

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what is the the total amount of living matter within a given trophic level

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what is the the total amount of living matter within a given trophic level

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A :  Genes
B:    A Capsid
C:    Cell Divison
D: Biomass

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The total amount of living tissue within a given trophic level is called the what?

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The total amount of living tissue within a given trophic level is called the what?

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A)Organic mass
B)Trophic mass
C)Energy mass
D)Biomass
Answer is D.

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1. Coyotes are opportunistic predators that are found throughout most of North America. They typically feed on small mammals, insects, and fruits and vegetables. They are known for their dietary adaptability. The best description of their role in the food web would be: A. An herbivore B. A carnivore C. An omnivore D. A primary producer

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a. something that has only occurred for the last 50 years.
b. a natural phenomenon that maintains Earth’s temperature range.
c. the result of the differences in the angle of the sun’s rays.
d. an unnatural phenomenon that causes heat energy to be radiated back into the
atmosphere.
Answer: B

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Which of the following is a biological aspect of an organism’s niche?
a. the water in the area
b. the way it gets food
c. amount of sunlight
d. composition of soil
answer: B

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Which organism is most likely to use anaerobic respiration? A bird B moss C tree D yeast

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Which organism is most likely to use anaerobic respiration? A bird B moss C tree D yeast

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Answer: D

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. An interaction in which an animal feeds on plants is calleda. carnivory. c. predation.b. herbivory. d. symbiosis

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. An interaction in which an animal feeds on plants is calleda. carnivory. c. predation.b. herbivory. d. symbiosis

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answer : c.

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A. Primary Consumers
B. Primary Producers
C. Herbivores
D. Ominvores
Answer: B