6D and E Review

What is adaptive radiation?

• Adaptive radiation is the process of species becoming more similar over time.
• Adaptive radiation is the rapid evolution of diversely adapted species from a common ancestor.
• Adaptive radiation refers to the extinction of species due to environmental changes.
• Adaptive radiation is the slow evolution of similar species in isolation.

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Darwin's finches are an example of adaptive radiation. The finches on the main island did not see speciation while the smaller island did. What would cause this to be possible?

• Lack of food sources on the main island.
• Similar environmental conditions on both islands.
• High population density on the main island.
• Different environmental pressures and isolation on the smaller island led to less competition.

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If two populations are separated by a physical barrier, will they be able to reproduce after year pass and mutations accumulate in the populations?

• They will reproduce only if they are the same species.
• Mutations will enhance their ability to reproduce.
• No, they may not be able to reproduce after mutations accumulate because they are too different genetically.

• Yes, they will always be able to reproduce.

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Match the following type of isolation with the description.

• a physical barrier separates populations

• 
• courtship / rizz does not match

• 
• species breed at different times

• 

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What does not occur between two populations in order for speciation to occur?

• Gene flow does not occur between the populations.

• Natural selection occurs between the populations.
• Hybridization occurs between the populations.
• Isolation doesn't between the populations.

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Which of the following explains the difference between divergent and convergent evolution?

• Divergent evolution leads to the extinction of species, whereas convergent evolution promotes biodiversity.
• Divergent evolution is the process where related species evolve different traits, while convergent evolution is when unrelated species evolve similar traits.
• Divergent evolution occurs only in plants, while convergent evolution occurs only in animals.
• Divergent evolution is when species adapt to the same environment, while convergent evolution is when they adapt to different environments.

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What is defined by a change in a population due to chance (random)?

• Gene flow
• Mutation
• Genetic drift
• Natural selection

After a random event, the frequency of the blue allele ​ (a)   while the red allele ​ (b)   . This resulted in ​ (c)   alleles in the gene pool ​ (d)   the chance event.

• decreased
• increased
• less
• after
• more
• before

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How does a founder effect event affect the population size?

• The founder effect increases the population size.
• The founder effect stabilizes the population size.
• The founder effect has no impact on population size.
• The founder effect typically decreases the population size.

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If a founder effect is random, are these the only possible new populations? Why?

• No, the founder effect only affects existing populations.
• Yes, the founder effect only creates one new population.
• No, there can be many possible new populations due to the randomness of the founder effect.
• Yes, all new populations must be identical to the original.

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