AP Bio: Evolution 7.1-7.4

which of the following best describes the concept illustrated:

The large ground finch with a greater beak depth are in highest frequency in the population.

• Finches with certain beak depths have a difficulty finding a mate

• Parental pairs with a specific beak depth ate the most nutritious seeds.

• Parental pairs with a specific beak depth had the highest reproductive fitness.

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Which statement explains the following:

A strain of Staphylococcus has evolved the ability to absorb the iron from their host's hemoglobin. However different strains (different genotypes) of staphylococcus infect different species.

• Each host transcribes and translates this gene differently.

• S. aureus develops a mutualistic relationship with each host species.

• Each strain is best adapted to a specific host species.

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High frequency of a phenotype in a population =

• High Reproductive Fitness

• Low Reproductive Fitness

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High Rates of Reproduction (fertility rate) =

• High Reproductive Fitness

• Low Reproductive Fitness

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Genetic Variety in a Gene Pool =

• signs of a diverse and stable population

• signs of a bottlenecked population

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Low Genetic Variety in a Gene Pool =

• signs of a diverse and stable population

• signs of a bottlenecked population

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Climate change is disrupting the length of winter in various ecosystems, resulting in less snowfall and milder winters. Arctic Fox change color

The percentage of brown phenotype (BB) vs the white phenotype (bb) has decreased over the last 20 years. What choice explains this change:

• Since the brown genotype is dominant, it will eventually eliminate the recessive white genotype from the population.

• The directional selection toward a darker phenotype is random and likely due to a bottleneck event.

• With milder winters, the advantage of gray feathers that blend into a snowy environment has decreased.

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What choice justifies this statement:

Through decades of breeding, laying hens have been bred for very high production of eggs. Modern commercial hens produce a very high yield of around 300 eggs a year. Chickens will naturally live for 6 or more years but after 12 months of laying, the hen's productivity will start to decline.

• Reproductive Fitness

• Selective Breeding

• Selective Pressure

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What contributes to genetic variety in a population of bacteria, Staphylococcus aureus?

• random mutations

• independent assortment

• crossing over

• random fertilization

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Choose all that apply: What contributes to genetic variety in a population of jungle fowl, Gallus gallus?

• random mutations

• independent assortment

• crossing over

• random fertilization

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