Evolution

Which of the following is a fossil?

• a plant that has recently died
• a group of organisms that can reproduce
• a structure or organ that no longer functions
• a trace of an organisms that existed in the past

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What must be challenging for natural selection to occur?

• humans
• mutations
• breeders
• environment

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Mutations are important because they bring about

• genetic variation/differeneces so a population can evolve.

• They created the Ninja Turtles.

• They create a population that is exactly the same and evolution can occur.

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What is the term for a feature that allows an organism to survive better in its environemtn?

• variation

• adaptation

• homologous structure

• vestigial structure

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Natural selection results in change over time by acting on traits that are

• inheritable

• new
• mutated 
• better than the best

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Darwin wrote that organisms with traits that are best suited to the environment will ________________

• increase in number
  
• become extinct
  

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Some organisms that share a common ancestor have features that have different functions, but similar structures.  These are known as

• vestigial structures
• analogous structures
• homologous structures
• fossil structures

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What increases genetic variation when animals move from one population to another

• genetic drift
• sexual selection
• bottleneck effect
• gene flow

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What is the study of organisms at the early stages of development?

• DNA studies
• embryology 
• extinction
• fossil record

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When an organism is completely wiped out of existence, we call it?

• extinction
• adaptation
• evolution
• inbreeding

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