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141 If an individual is heterozygous for a gene that affects flower color, what will be the expected ratio of flower color phenotypes among the offspring?

A: 1:1 ratio of red to white flowers

B: 3:1 ratio of red to white flowers

C: 1:2 ratio of red to white flowers

D: 1:2:1 ratio of red, pink, and white flowers

Microbiology MCQ
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142 The data from which of the following sources would be most useful in predicting the potential impact of a new invasive species on an ecosystem?

A: Information about the reproductive rates of native species.

B: Historical data on past invasive species and their effects on similar ecosystems.

C: Observations of current species interactions in the ecosystem.

D: Data on climate patterns in the ecosystem.

Microbiology MCQ
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143 Which of the following would most likely be a limitation of the scientists’ approach to determining the evolutionary relationships among the populations?

A: Small sample sizes of individual plants from each population.

B: Large number of different environmental factors affecting plant growth.

C: Limited number of genetic markers used for comparison.

D: High variability in soil conditions among the sampling sites.

Microbiology MCQ
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144 Based on the figure, which of the following conclusions is best supported by the data presented?

A: The soil conditions in the moist region are too extreme for most plant growth.

B: There is a linear relationship between the number of plant species and the soil condition in the dry region.

C: There is a positive correlation between plant species diversity and soil condition in the moist region.

D: Soil conditions are a better predictor of plant species diversity in the dry region than in the moist region.

Microbiology MCQ
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145 The scientists can best determine whether the new trait evolved independently in each population by determining which of the following?

A: The relative fitness of each population in the presence of the new trait.

B: The genetic sequences of the populations in the regions associated with the new trait.

C: The extent of phenotypic variation of the new trait within each population.

D: The environmental conditions experienced by each population over time.

Microbiology MCQ
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146 Which of the following statements provides the best explanation for the main trend shown in the graph above?

A: The pigment concentration in leaves is not affected by light exposure.

B: Leaf growth is positively correlated with pigment concentration.

C: Pigment concentration is inversely correlated with light exposure.

D: Leaf growth increases linearly with increased pigment concentration.

Microbiology MCQ
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147 What is the main way in which the cells of the leaves of the small evergreen trees differ from the cells of the leaves of the large trees?

A: The cells of the leaves of the small evergreen trees have larger vacuoles.

B: The cells of the leaves of the small evergreen trees have thicker cell walls.

C: The cells of the leaves of the small evergreen trees have a greater number of chloroplasts.

D: The cells of the leaves of the small evergreen trees have more mitochondria.

Microbiology MCQ
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148 Initially, which of the following isolating mechanisms is likely to have been the most important in preventing gene flow between the two populations of Rhagoletis?

A: Temporal isolation due to differences in mating time.

B: Behavioral isolation due to differences in mating behaviors.

C: Mechanical isolation due to differences in reproductive structures.

D: Ecological isolation due to different host plants.

Microbiology MCQ
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149 The divergence between the two populations of Rhagoletis must have occurred very rapidly because

A: The apple tree was imported into North America with European settlement approximately 200 years ago

B: Flies were imported into North America with European settlement approximately 200 years ago

C: Long-distance rail transport of fruit increased only after the American Civil War (1861 -1865)

D: Heavy use of gunpowder during the American Civil War (1861 -1865) led to increased mutation rates in many natural populations of plants and animals

Microbiology MCQ
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150 A common laboratory investigation involves putting a solution of starch and glucose into a dialysis bag and suspending the bag in a beaker of water, as shown in the figure below. The investigation is aimed at understanding how molecular size affects movement through a membrane. Which of the following best represents the amount of starch, water, and glucose in the dialysis bag over the course of the investigation?

A: A)

Microbiology MCQ
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