Natural Selection, Adaptations and Selective Breeding, Dichotomous Keys

It is very common for yellow labs to have bad hips. This is because humans have bred labs for behavior, not hip strength.  This is an example of 

• Natural Selection
• Selective breeding
• Mitosis
• Fossil Record

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All of the following statements are reasons for selective breeding except:

• To produce offspring with desirable characteristics
• Farmers increase their profit by improving crops
• To improve the quality of food products
• To increase migration patterns

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Which statement best describes the process of natural selection?

• Populations can survive in different locations on earth
• Environmental conditions limit the number of species on Earth
• Populations grow when resources are abundant
• The traits of a species can change over time

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Which of these statements best describes what Charles Darwin observed on the Galapagos Islands?

• The finch population on each island was similar, but unique.
• the finches on the islands ate seeds and nuts but no insects.
• The finches on the islands were the same as the finches in Ecuador
• the finches could produce offspring only with finches from other islands.

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The image you see is a mammoth.  Which trait most suggests that the mammoth was adapted to live in a cold climate?

• its thick, furry coat
• its long, flexible trunk
• its sharp, curved tusks
• its broad, powerful body

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Fill in the blank
Some organisms go into a state of __________ during cold winter months to conserve energy.

• Migration
• Mimicry
• Hibernation
• Over eating

An adaption is:

• a characteristic that helps a population of species survive and reproduce
• a characteristic of one male that allows him to become the dominant animal of the herd 
• When one organism lives longer than any other organism  in its population 
• a change that occurs quickly within a species 

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All of the following statements are true EXCEPT:

• An adaptation must be common among the entire population 
• an Adaptation can involve just a few individuals 
• an adaptation happens over time
• an adaptation can either be physical or behavioral 

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Xylem is a plant tissue mad eup of elongated cells stacked end to end, the length of the plant's stem. Which function is xylem specifically adapted to perform in plants?

• Help prevent water loss
• Exchange gases with the atmosphere
• Capture sunlight for photosynthesis
• Transport water from roots to leaves 

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Which of the following statements best describes how adaptations benefits an organism?

• It guarantees that the organism will survive
• It increases an organism's chances of survival
• It guarantees that an organism will have a stout beak
• It increases an organism's chance of becoming extinct 

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