BIO 182 EXAM 2 WITH CORRECT
QUESTIONS AND ANSWERS 2025
Which of these individuals has the highest biological fitness in an evolutionary sense? -
CORRECT-ANSWERS>>>>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.
- CORRECT-ANSWERS>>>>False
Which of the following statement(s) regarding evolutionary adaptation is/are true? Select
ALL that apply. - CORRECT-ANSWERS>>>>- A trait that is adaptive in one environment may
not be adaptive in a different environment.
- The adaptive value of a trait can change over time as the environment changes.
, What are the core principles necessary for natural selection to occur in a population? Select
ALL that apply. - CORRECT-ANSWERS>>>>- Traits need to be passed on from parents to
offspring
- There needs to be variation in a population
- 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? - CORRECT-
ANSWERS>>>>New selective pressures favored individuals with the plated phenotype,
causing the plated allele frequency in the population to quickly increase.
True or False: Sexual selection is a case of natural selection that describes evolution due not
to variable survival rates, but rather due to variable reproductive rates stemming from
QUESTIONS AND ANSWERS 2025
Which of these individuals has the highest biological fitness in an evolutionary sense? -
CORRECT-ANSWERS>>>>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.
- CORRECT-ANSWERS>>>>False
Which of the following statement(s) regarding evolutionary adaptation is/are true? Select
ALL that apply. - CORRECT-ANSWERS>>>>- A trait that is adaptive in one environment may
not be adaptive in a different environment.
- The adaptive value of a trait can change over time as the environment changes.
, What are the core principles necessary for natural selection to occur in a population? Select
ALL that apply. - CORRECT-ANSWERS>>>>- Traits need to be passed on from parents to
offspring
- There needs to be variation in a population
- 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? - CORRECT-
ANSWERS>>>>New selective pressures favored individuals with the plated phenotype,
causing the plated allele frequency in the population to quickly increase.
True or False: Sexual selection is a case of natural selection that describes evolution due not
to variable survival rates, but rather due to variable reproductive rates stemming from
