speciation

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this?

• behavioral isolation
• temporal isolation 
• gametic isolation
• geographic isolation 

Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are beginning to only mate with the type of males with the tail they prefer. What type of reproductive barrier is this?

• behavioral isolation
• hybrid sterility 
• temporal isolation
• mechanical isolation 

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The flowers of pink tulips open in the morning, while the flowers of lavender tulips open in the early afternoon. The bees that pollinate these tulips cannot carry pollen back & forth between the two types of tulips because of their flowers being closed at different times of day. What type of reproductive barrier is this?

• behavioral isolation
• hybrid sterility 
• temporal isolation
• mechanical isolation 

The term for the formation of new and distinct species over the course of evolution is...

• speciation
• biological species concept
• reproductive barrier
• natural selection

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What is a species? 

• A group of organisms that can mate with each other and produce fertile offspring. 
• A group of organisms that can mate and produce offspring even if those offspring are infertile.
• A group of organisms that genetically are very different from each other. 
• Indivual organisms that live in the same environment. 

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What evidence does speciation provide for the theory of evolution by natural selection?

• Speciation can show us that new species don't choose to adapt, but have changed due to diverging from an original species due to reproductive barriers.
• Speciation can show us that new biological species can come from divergence (separating) due to reproductive barriers.
• Speciation can show us that environmental changes & genetic variation play a role in the process of a new species diverging from an original species due to reproductive barriers. 
• All of the above fit!

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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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The variations within a population will most likely be passed on to future generations if they are: 

• Due to a mutation and result in beneficial variations
• Due to a mutation and result in harmful variations
• Not due to a mutation and result in harmful variations
• Not due to a mutation and result in beneficial variations

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___ are mistakes in the DNA that cause variation within a species.

• mutations
• adaptations
• speciations
• isolations

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Organisms with the most beneficial traits will survive.  This is commonly known as ___.

• theory of evolution
• variations
  
• survival of the fittest
• ecosystems
  

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