BIO 182- MODULE 3B PRACTICE
EXAM 2026 WITH DETAILED
QUESTIONS AND ACCURATE
ANSWERS GRADED A+
Which of these individuals has the highest biological fitness in an evolutionary sense?
Select only ONE answer choice. - answer-an organism that dies after 5 days of life but
leaves 10 offspring, all of whom survive to reproduce
True or False: The genotype of an organism describes the physical traits that one can
observe. - answer-False
What are the core principles necessary for natural selection to occur in a population?
Select ALL that apply. - answer-a. Phenotypic traits need to be passed on from parents
to offspring
c. There needs to be variation phenotypic traits in a population
e. Some organisms have a higher reproductive success than others
Evolution of a new trait typically takes many generations. Yet a dramatic shift in the
extent of armor plating in the Lake Washington stickleback population occurred in the
50 years following the cleanup of the lake. Which of the following best describes the
mechanism of the rapid evolution of the armor phenotype in the Lake Washington
sticklebacks? Select only ONE answer choice. - answer-New selective pressures
favored individuals with the plated phenotype, causing the plated allele frequency in the
population to quickly increase.
In the northeastern United States and adjacent Canada, there has been intense
industrial fishing for large predatory fishes, such as Atlantic Cod. Prior to industrial
fishing, the relationship between the size of a fish at maturity and its fitness is shown by
the graph on the left (below). Fishing is size-selective, with fishers generally taking the
largest fish. The fitness function during industrial fishing is reflected in the graph on the
right (below). - answer-Cod experienced balancing selection (favoring a bell-shaped
EXAM 2026 WITH DETAILED
QUESTIONS AND ACCURATE
ANSWERS GRADED A+
Which of these individuals has the highest biological fitness in an evolutionary sense?
Select only ONE answer choice. - answer-an organism that dies after 5 days of life but
leaves 10 offspring, all of whom survive to reproduce
True or False: The genotype of an organism describes the physical traits that one can
observe. - answer-False
What are the core principles necessary for natural selection to occur in a population?
Select ALL that apply. - answer-a. Phenotypic traits need to be passed on from parents
to offspring
c. There needs to be variation phenotypic traits in a population
e. Some organisms have a higher reproductive success than others
Evolution of a new trait typically takes many generations. Yet a dramatic shift in the
extent of armor plating in the Lake Washington stickleback population occurred in the
50 years following the cleanup of the lake. Which of the following best describes the
mechanism of the rapid evolution of the armor phenotype in the Lake Washington
sticklebacks? Select only ONE answer choice. - answer-New selective pressures
favored individuals with the plated phenotype, causing the plated allele frequency in the
population to quickly increase.
In the northeastern United States and adjacent Canada, there has been intense
industrial fishing for large predatory fishes, such as Atlantic Cod. Prior to industrial
fishing, the relationship between the size of a fish at maturity and its fitness is shown by
the graph on the left (below). Fishing is size-selective, with fishers generally taking the
largest fish. The fitness function during industrial fishing is reflected in the graph on the
right (below). - answer-Cod experienced balancing selection (favoring a bell-shaped
