Evolution in Biology Quiz

Question 1In a Hardy-Weinberg population, the frequency of allele A is 0.30. Find the expected heterozygote frequency as a decimal, rounded to two decimal places.

Enter a number.

Answers within 0.005 of the expected value are accepted.

Question 2A diploid sample contains 18 AA, 44 Aa, and 38 aa individuals. Find the frequency of allele A as a decimal, rounded to two decimal places.

Enter a number.

Answers within 0.005 of the expected value are accepted.

Question 3A heritable color makes beetles harder for predators to see, and its bearers leave more offspring. Which mechanism changes the population?

Inherited traits linked to unequal reproductive successDirected mutation responding to the beetles’ needsChance determines which color variants reach the next generationColor acquired by each beetle through repeated hiding

Question 4One plant adjusts its leaves after moving into shade, then reverses the adjustment in bright light. What does this observation establish?

A mutation aimed at improving light collectionA new species formed by altered leaf positionAn inherited shift across the plant populationA reversible response within the life of one plant

Question 5Two separated populations later meet but rarely produce fertile offspring together. What evidence supports divergence into species?

The greater body size of the more numerous populationThe time spent apart regardless of reproductionThe barriers restricting the exchange of genetic materialThe use of separate names by local observers

Question 6A bat wing and a whale flipper have corresponding bones arranged in the same underlying pattern. What does this support?

A recent transfer of bones between the two lineagesA ranking of the wing above the flipper in complexityAn inherited body plan used for different functionsIndependent origins caused by identical movements

Question 7Fossil sampling leaves a gap between two dated collections. Which conclusion is justified?

The surviving record is limited by preservation and discoveryThe missing interval lasted exactly one generationThe younger collection descended from the oldest specimen foundThe gap proves the region supported no organisms

Question 8After antibiotic exposure, descendants of resistant bacteria dominate a culture. Which account fits the result?

The drug taught sensitive cells how to avoid damageSurviving bacteria chose the mutations needed for survivalResistance proves the bacteria became a more complex speciesThe less susceptible cells contributed more offspring

Question 9One inherited feature persists in a population, but its effect on reproduction is unknown. Which finding would support calling it an adaptation?

Its inheritance making the feature unsuitable for scientific testingIts past increase linked to leaving more surviving descendantsIts continued presence establishing that it improves survivalIts appearance in anticipation of a later environmental need

Question 10A formerly useful trait becomes costly after the habitat changes. What does this show about evolution?

The population stops carrying inherited variationAn inherited advantage depends on local conditionsEvolution reverses the sequence of past mutationsSurvival rewards movement toward a fixed ideal form

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Evolution in Biology Quiz

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