Exam 3: Biodiversity and Evolution

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Transferring genes from a bacteria into rice to boost its vitamin content is an example of

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The golden tree frog that can only be found in one particular area is an example on a(n)____________________ species.

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Some of the offspring of a beetle develop spots.These spots make it harder for birds to see the beetles and thus,the spotted beetles tend to survive and produce more offspring than the beetles without spots.This heritable trait is called a(n)____________________.

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Species that are found in only one area and are especially vulnerable to extinction are referred to as which type of species?

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Toxic runoff from the hillsides will first affect the ____________________ zone of a lake.

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An estuary is an important area because it is a partially enclosed area where seawater mixes with rivers and nutrient from watersheds.

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Genetically modified bacteria used to clean up oil spills are a result of ____________________.

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____________________ in any cell can result in new genetic traits that can produce a better chance of survival.

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A healthy,nutrient-rich lake is called a(n)____ lake.

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Adaptations make organisms more suited for the environments in which they live.We notice that,nonetheless,organisms do fall short of being perfectly suited to their environments.The adaptive process is limited by

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  Marine life zones: a.Coastal zone. d.Abyssal zone. b.Euphotic zone. e.Estuarine zone. c.Bathyal zone. -In a deep,temperate zone lake,the littoral zone is similar to which marine life zone in terms of photosynthesis? Marine life zones: a.Coastal zone. d.Abyssal zone. b.Euphotic zone. e.Estuarine zone. c.Bathyal zone. -In a deep,temperate zone lake,the littoral zone is similar to which marine life zone in terms of photosynthesis?

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The mechanism accepted by scientists for most evolutionary change is

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____ refers to the second phase of speciation,and it involves changes in gene pools.

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Leading biologists suggest that during the 20ᵗʰ century,extinction rates increased by 100-1000 times the natural background extinction rate.

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In undisturbed regions with moderate to high average annual precipitation you would most likely find

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Biomes are distinct regions separated from one another by drastic climate and vegetative differences.

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Economic growth and development increase the amount of sedimentation in rivers and streams and thus alter the diversity of the aquatic ecosystem.

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In a region with erratic precipitation and periodic drought and fire,you would most likely find

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  -On the temperate-zone lake figure,choose the zone of open water where photosynthesis can occur. -On the temperate-zone lake figure,choose the zone of open water where photosynthesis can occur.

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Mutations can result in changes in

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