Exam 4: Biodiversity and Evolution

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   Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -Which graph (A or B) is representative of a generalist species? Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -Which graph (A or B) is representative of a generalist species?

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B

Mass extinctions, with 25─95% of species going extinct, have occurred how many times in the history of the earth?

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C

  -After looking at the figure above, explain how the movement of the continents can help explain why some species have the geographic distribution that is observed today. -After looking at the figure above, explain how the movement of the continents can help explain why some species have the geographic distribution that is observed today.

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Species that arose or were present at the time of the unified continents would have been able to expand broadly.As the continents began to move apart those species would have become isolated from one another, providing for the fragmented distribution that is observed in a group of species such as the marsupials.Their distribution shows larger numbers of species in southern South America and Australia, continents that are currently far apart.

Even if a beneficial heritable trait is present in a population, the population's ability to adapt may be limited by its ____________________.

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Briefly explain the interaction between mutations, reproductive success, and adaptation or adaptive traits.

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Amphibians are sensitive to changes in the environment and their decline suggests a decline in the environmental health of the earth.

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A species in an ecosystem that shapes communities by creating and enhancing habitats in ways that benefit other species is called

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Scientists have used genetic engineering to do all of the following, except

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All of the following would be true of a specialist species, except

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____________________ diversity is the most obvious component of biodiversity.

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Humans are playing a decreasing role in the process of extinction.

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According to an IUCN 2009 study __________ percent of the world's open ocean shark species are threatened with extinction.

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A(n) ____________________ is a significant increase in extinction rates above the background level.

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New species form when one species splits into two or more different species, a process called _______________.

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Species that migrate into, or that are deliberately or accidentally introduced into, an ecosystem are called ____________________.

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If the percentage of atmospheric oxygen increased only by about 4% the atmosphere would likely become a giant fireball.

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From a scientific point of view, which of the following is true?

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Among his many accomplishments, Edward O.Wilson is working on Harvard University's ____________________, an online database of the earth's known and name species.

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New species arise as the result of two processes, geographic and reproductive isolation.Explain how these processes work together to produce new species.

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   Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -What advantage does the characteristic indicated by letter D bestow upon the animal who occupies this niche as opposed to the animal occupying the other niche? Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -What advantage does the characteristic indicated by letter D bestow upon the animal who occupies this niche as opposed to the animal occupying the other niche?

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