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Deserts, tropical forests, prairie grasslands, and coniferous forests are all examples of


A) different species
B) ecosystems with the highest biodiversity
C) ecosystems with low genetic biodiversity
D) biomes
E) populations

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

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Clearly explain the relationship between the geologic process of plate tectonics and the biological process of evolution over geologic time.

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As the plates that cover the planet have...

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____________________ help to create habitats and ecosystems.

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Approximately how long have there been autotrophic producers on Earth?


A) 1 million years
B) 2 million years
C) 1 billion years
D) 2 billion years
E) 3.7 billion years

F) B) and D)
G) None of the above

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Match the type of diversity with the proper choice below. -Estuaries and wetlands have very high primary productivity.


A) functional diversity
B) genetic diversity
C) ecological diversity
D) species diversity

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

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____________________ is a significant rise in extinction rates above the background level.

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Which of the following organisms would best be described as a specialist species?


A) flies
B) cockroaches
C) white-tailed deer
D) panda bears
E) humans

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

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Amphibians are


A) frogs, toads, and salamanders.
B) fish, frogs, and salamanders.
C) salamanders, sea anemone, and frogs
D) clams, oysters, frogs, and toads.
E) none of these answers

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

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A(n) ____________________ includes an organism's range of tolerance for physical and chemical conditions.

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Species that are found in only one area are called ____________________ and are especially vulnerable to extinction.

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Which of the following statements is false?


A) Genetic diversity helps prevent a species from becoming extinct.
B) The phenomenon in which animals with favorable adaptation reproduce more rapidly is called differential reproduction.
C) Geographic isolation is a common mechanism contributing to speciation.
D) By definition, the fittest animals are the largest and strongest animals.
E) A change in environmental conditions can lead to adaptation only for traits already present in the gene pool of a population.

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

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Cows that can produce larger amounts of milk are a result of ____________________.

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artificial...

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Which of the following statements best describes insect species as a group?


A) They have backbones.
B) About two million species have been identified by scientists.
C) They are resistant to extinction.
D) They have skin or integument similar to mammals.
E) All of these answers.

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

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Geographic isolation and reproductive isolation can both lead to speciation.

A) True
B) False

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Mutations can occur in any cell type, however only those that occur in ____________________ are passed on to offspring, thus allowing for evolution.

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Approximately what portion of the Earth's atmosphere is composed of oxygen?


A) 15%
B) 21%
C) 25%
D) 52%
E) 78%

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

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Match the type of diversity with the proper choice below. -Caribbean snails of the same population exhibit a variety of shell colors and banding patterns.


A) functional diversity
B) genetic diversity
C) ecological diversity
D) species diversity

E) All of the above
F) None of the above

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Which of the following is true of a trait that creates a specific advantage for some organisms in the struggle to survive?


A) It enables individuals with the trait to leave more offspring than other members of the population leave.
B) It results in greater genetic diversity in the offspring of those organisms that possess it than in those that do not possess the trait.
C) It causes the ratio of male and female offspring produced to be equal.
D) It results in offspring that are genetically different than the parents.
E) It results in non-heritable traits being passed from parent to offspring.

F) All of the above
G) None of the above

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Biodiversity consists of


A) the variety of the Earth's species
B) the genes the Earth's species contain
C) the ecosystems in which the Earth's species live
D) the ecosystem processes of energy flow and nutrient cycling
E) all of these answers

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

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Extinction results in the permanent loss of genetic diversity.

A) True
B) False

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