AP Biology Test Question Review newest
edition 2025 with question and correct
answers well elaborated and A+ GRADED
and verified
Which of the following is most likely the cause of the pattern of frequency of trisomy 21
births in the selected maternal age-groups? - CORRECT ANSWER at older maternal
ages, the incidence of errors in meiosis during egg production increases, which leads to
an increase in nondisjunction.
In the cross diagrammed above, the expected and observed results are shown. Which
of the following best explains the observed results of the cross? - CORRECT ANSWER
The genes for body color and wing shape are located close to each other on the same
chromosome.
Table 1. Effect of Exposing Identical Caterpillars to Specific Colors of Light. Which of
the following best explains the cause of the phenotypic variation observed in the
butterflies? - CORRECT ANSWER There was a differential gene expression of wing
color and body size in response to the colors of light the caterpillars were exposed to.
A current challenge for doctors involves the bacterial strain Clostridioides difficile, which
no longer responds to traditional antibiotic treatments. Which of the following best
explains why this particular strain of bacteria is resistant to antibiotic treatment? -
CORRECT ANSWER The bacteria have high genetic variability and high reproductive
rates
Birds feed off of gardens and bird feeders. Which of the following best explains the
directional shift in beak length in these birds? - CORRECT ANSWER longer beaks
allow the birds to better access seeds in bird feeders.
Based on the information in Table 1, which of the following statements best describes
the production of nearly identical AFGPs in these two species of fish? - CORRECT
ANSWER The fish live in environments with similar selective pressures, and those that
produce AFGPs are better able to survive.
The phenotypic variation in behavior between the two populations can best be
described as resulting from - CORRECT ANSWER artificial selection
B changed from 0.4 to 0.6. Which of the following could best explain the increase in the
frequency of the B allele in the population after five years? - CORRECT ANSWER the
frequency of the B allele increased due to selective pressures of the environment.
edition 2025 with question and correct
answers well elaborated and A+ GRADED
and verified
Which of the following is most likely the cause of the pattern of frequency of trisomy 21
births in the selected maternal age-groups? - CORRECT ANSWER at older maternal
ages, the incidence of errors in meiosis during egg production increases, which leads to
an increase in nondisjunction.
In the cross diagrammed above, the expected and observed results are shown. Which
of the following best explains the observed results of the cross? - CORRECT ANSWER
The genes for body color and wing shape are located close to each other on the same
chromosome.
Table 1. Effect of Exposing Identical Caterpillars to Specific Colors of Light. Which of
the following best explains the cause of the phenotypic variation observed in the
butterflies? - CORRECT ANSWER There was a differential gene expression of wing
color and body size in response to the colors of light the caterpillars were exposed to.
A current challenge for doctors involves the bacterial strain Clostridioides difficile, which
no longer responds to traditional antibiotic treatments. Which of the following best
explains why this particular strain of bacteria is resistant to antibiotic treatment? -
CORRECT ANSWER The bacteria have high genetic variability and high reproductive
rates
Birds feed off of gardens and bird feeders. Which of the following best explains the
directional shift in beak length in these birds? - CORRECT ANSWER longer beaks
allow the birds to better access seeds in bird feeders.
Based on the information in Table 1, which of the following statements best describes
the production of nearly identical AFGPs in these two species of fish? - CORRECT
ANSWER The fish live in environments with similar selective pressures, and those that
produce AFGPs are better able to survive.
The phenotypic variation in behavior between the two populations can best be
described as resulting from - CORRECT ANSWER artificial selection
B changed from 0.4 to 0.6. Which of the following could best explain the increase in the
frequency of the B allele in the population after five years? - CORRECT ANSWER the
frequency of the B allele increased due to selective pressures of the environment.
