Bimm Quizzes – Midterm questions
with 100% correct answers rated A+
The tilt of the earth's axis results in which geophysical rhythm? - correct answer ✔✔ Seasonal
What further insight into plant leaf-folding rhythms could be concluded from the work of de
Candolle in the 1800s that was not shown conclusively by de Marian in the 1700s? - correct
answer ✔✔ The persistent rhythm has a period that can't be generated by a signal from the
turning of the earth.
We now know that the leaf-folding patterns of Mimosa observed by de Marian in the 1700s
represented a circadian rhythm. Which of the following statements describes a property of a
circadian rhythm that de Marian observed? - correct answer ✔✔ Circadian rhythms persist
when removed from the light/dark cycle.
Which important scientist from the early days of chronobiology explored the effects of varying
light intensity on circadian rhythms of many different organisms? - correct answer ✔✔ Jürgen
Aschoff
According to Part I of the Basics to Chronobiology, which of the following is NOT a defining
principle of circadian clocks? - correct answer ✔✔ Exogenously driven
Which of the following movements of celestial bodies is most associated with the timing of
tides? - correct answer ✔✔ The moon orbits the earth in the same direction that the earth is
spinning.
Which of the following events in the physical environment is least likely to result in evolution of
biological timing in an organism? - correct answer ✔✔ A series of earthquakes.
, What would the periodicity be of a tidal rhythm from a coastal organism that was brought into
the lab and kept in an aquarium on a 12 h light/ 12 h dark cycle? - correct answer ✔✔ 12.4 h or
24.8 h
We refer to the circadian clock as "endogenous." What does this term mean in context? -
correct answer ✔✔ Residing within the organism
Under what conditions is a circadian rhythm in an organism most likely to be almost exactly 24
h? - correct answer ✔✔ When the organism is in an environment that undergoes a recurrent
change every 24 h.
San Diego has a photoperiod of LD14:10 on the day of the summer solstice in June. If your
friend told you that her hometown, which you had never heard of before, has a summer solstice
photoperiod in June of LD15:9, what would you immediately know about her hometown? -
correct answer ✔✔ It is north of San Diego.
Why does San Diego get more sunlight per day in June than in December? - correct answer ✔✔
The northern hemisphere is tilted towards the sun in June and away from the sun in December.
What was the conclusion of the experiment in which bees trained in Paris were shipped to New
York? - correct answer ✔✔ Environmental conditions in the location where the bees were being
measured were not driving the observed patterns.
What was different between Beling's "training" of bees to sugar water and Forel's observations
with jam that contributed to the conclusions? - correct answer ✔✔ Beling trained the bees in
constant conditions in the absence of an environmental cycle.
What was Forel's first assumption regarding the behavior of bees at his breakfast table? -
correct answer ✔✔ That they were sensing and attracted to the jam.
with 100% correct answers rated A+
The tilt of the earth's axis results in which geophysical rhythm? - correct answer ✔✔ Seasonal
What further insight into plant leaf-folding rhythms could be concluded from the work of de
Candolle in the 1800s that was not shown conclusively by de Marian in the 1700s? - correct
answer ✔✔ The persistent rhythm has a period that can't be generated by a signal from the
turning of the earth.
We now know that the leaf-folding patterns of Mimosa observed by de Marian in the 1700s
represented a circadian rhythm. Which of the following statements describes a property of a
circadian rhythm that de Marian observed? - correct answer ✔✔ Circadian rhythms persist
when removed from the light/dark cycle.
Which important scientist from the early days of chronobiology explored the effects of varying
light intensity on circadian rhythms of many different organisms? - correct answer ✔✔ Jürgen
Aschoff
According to Part I of the Basics to Chronobiology, which of the following is NOT a defining
principle of circadian clocks? - correct answer ✔✔ Exogenously driven
Which of the following movements of celestial bodies is most associated with the timing of
tides? - correct answer ✔✔ The moon orbits the earth in the same direction that the earth is
spinning.
Which of the following events in the physical environment is least likely to result in evolution of
biological timing in an organism? - correct answer ✔✔ A series of earthquakes.
, What would the periodicity be of a tidal rhythm from a coastal organism that was brought into
the lab and kept in an aquarium on a 12 h light/ 12 h dark cycle? - correct answer ✔✔ 12.4 h or
24.8 h
We refer to the circadian clock as "endogenous." What does this term mean in context? -
correct answer ✔✔ Residing within the organism
Under what conditions is a circadian rhythm in an organism most likely to be almost exactly 24
h? - correct answer ✔✔ When the organism is in an environment that undergoes a recurrent
change every 24 h.
San Diego has a photoperiod of LD14:10 on the day of the summer solstice in June. If your
friend told you that her hometown, which you had never heard of before, has a summer solstice
photoperiod in June of LD15:9, what would you immediately know about her hometown? -
correct answer ✔✔ It is north of San Diego.
Why does San Diego get more sunlight per day in June than in December? - correct answer ✔✔
The northern hemisphere is tilted towards the sun in June and away from the sun in December.
What was the conclusion of the experiment in which bees trained in Paris were shipped to New
York? - correct answer ✔✔ Environmental conditions in the location where the bees were being
measured were not driving the observed patterns.
What was different between Beling's "training" of bees to sugar water and Forel's observations
with jam that contributed to the conclusions? - correct answer ✔✔ Beling trained the bees in
constant conditions in the absence of an environmental cycle.
What was Forel's first assumption regarding the behavior of bees at his breakfast table? -
correct answer ✔✔ That they were sensing and attracted to the jam.
