Speciation and Extinction

What happens when species produce too many offspring?

• Species share the limited resources 
• Species eat less so that all can survive
• Only those that are least fit can survive
• Only those that are best fit can survive

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Which statement is true of Natural Selection?

• It is the same process as artificial selection
• It is the mechanism of evolution
• Animal and plant breeders select desired traits to produce changes in a species
• It is a much shorter process than artificial selection

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Which of the following is an example of artificial selection?

• The loss of the dodo bird
• The finches of Galapagos
• The armadillo
• The breeding of dogs

In order for Natural Selection to occur population must:

• Over-reproduce
• Under-reproduce
• Have no variations
• Have no pressure from the environment

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While at the Galapagos Islands, Charles Darwin found that:

• There were slight differences in finches from island to island
• There were slight differences in finches on the islands compared to the mainland
• The shape of the finches beaks were different on each island
• All possible multiple choice answers

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Which of the following must happen for a new species to evolve?

• Isolation
• Adaptation
• Differentiation 
• All of the possible multiple choice answers

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When a population becomes divided by an event such as a new river forming, ____________ has occurred.

• Differentiation 
• Isolation
• Adaptation
• Separation

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Variations in a population are caused by:

• Natural Selection
• Selective Breeding
• Artificial Selection
• Random Mutations

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Extinction occurs when __________ happens. 

• Loss of habitat
• Isolation
• Differentiation
• Adaptation 

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If an environment changes, populations with ______________ have a better chance of survival.

• No genetic variations
• Genetic variations
• A small number
• A large number

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