Review for Quiz 2.1 Evolution

Which of the following is not a condition of evolution by natural selection?

• Mutations found in the autosomes

• Adaptations that aid in survival

• Variation of traits allowing for differentiated abilities to survive

• Competition for resources

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Match the term with it's appropriate scenario.

• Competition

• Over time the physical features of the african elephant have changed.

• Evolution

• Porcupines have features such as quills that aid in their ability to fight off predators.

• Adaptations

• Among a species of finches on the galapogos, some may have long beaks while others may have short beaks.

• Selection

• In a desert based ecosystem, organisms with an ability to withstand heat are more likely to survive and reproduce.

• Inherited Variation

• A lake only contains so much phytoplankton, a food source for fish, therefore only some individuals will be able to eat in a given season while others will not.

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Selection cannot occur without .... (One or more may be correct).

• Variation

• Competition

• Evolution

• Mutations

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Which of the following will increase in number at the fastest rate?

• A species that has adequate resources

• A species that does not have adequate resources

• The amount of food in an ecosystem

• The amount of shelter in an ecosystem

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Evolution can occur only if there is both ​ ​ (a)   and ​ (b)   within a species. If these two conditions are met ​ (c)   will occur. This is the environmental conditions choosing which traits are most advantageous. Those traits will be passed down from generation and are commonly called ​ (d)   .

• Competition
• variation
• selection
• adaptations

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Which of the following populations will have the greatest levels of inherited variation?

• A species with a high mutation rate and reproduces sexually with gametes created through meiosis. The gametes contain 34 different chromosomes.

• A species who reproduces asexually.

• A species that reproduces sexually, and creates gametes with meiosis. The gametes contain 2 chromosomes.

• A species that does make gametes with meiosis but has a high mutation rates.

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In the above example, how might this species of lizards evolve over time?

• Lizards will generally become lighter in color over time

• Lizards will generally become darker in color over time

• The lizard population will likely go extinct

• The lizard population will remain unchanged

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Which of the following is the MOST CORRECT description of evolution by natural selection?

• Individuals that inherit advantageous adaptations will have higher chance at survival, therefore they will pass the alleles for those adaptations to the next generation.

• Individuals that develop advantageous adaptations over their lifetime will survive better and pass all of their alleles to the next generation.

• Individuals that do not show any variation will most likely survive therefore increasing the size of their gene pool in the next generation.

• Individuals that acquire advantageous adaptations are better suited for survival, therefore they increase the variation of a population.

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Which of the following best explains the beak variation among these four species of finch?

• Competition for food resulted in the selection for different beak types

• The finches evolved different beaks intentionally due to their diet

• They all live on the same island

• The finches are unable to breed with each other, therefore their beaks developed differently.

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Populations evolve when the allele frequency of a given trait changes.

• True

• False

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