Course
Animal Biology
Study Pack
Set 5 The Physiological And Endocrine Basis Of Behavior
Question 1
(Multiple Choice)
Free
After a dry spring, rufous-winged sparrows in the Sonoran Desert wait for summer rainfall to stimulate the onset of reproduction. Sparrows likely use rainfall as an environmental cue because
A) rainfall is a predictable cue that ensures that they are primed for reproduction at the same time every year.
B) they live near the equator and the small changes in photoperiod are too difficult to use as a cue for reproduction.
C) the onset of the monsoon in the summer determines when sparrows migrate north for the breeding season.
D) they live in an arid, unpredictable environment where rainfall provides a more informative cue for resource availability and reproductive timing.
Answer
Question 2
(Multiple Choice)
Free
The naked mole rat lacks a circadian rhythm of activity. The ultimate adaptive significance of this point is that
A) because naked mole rats live underground, they are not exposed to daily changes in light intensity and thus have no cues for the entrainment of a circadian rhythm.
B) the environment of the naked mole rat is such that queens and kings gain no reproductive advantage by having a sterile work force that is active on a 24-hour schedule.
C) naked mole rats are primitive mammals that do not have the sophisticated mechanisms that control circadian rhythms.
D) naked mole rats do not have the genetic information that would enable them to develop a brain capable of circadian rhythms.
Answer
Question 3
(Multiple Choice)
Free
Refer to the figure.
In these figures, each horizontal line represents 1 day, and each vertical line represents a half-hour on a 24-hour timescale. Dark marks indicate periods of cricket calling. The bars at the top and middle represent the lighting conditions. The top figure demonstrates that in a constant light (LL) environment, male crickets
In these figures, each horizontal line represents 1 day, and each vertical line represents a half-hour on a 24-hour timescale. Dark marks indicate periods of cricket calling. The bars at the top and middle represent the lighting conditions. The top figure demonstrates that in a constant light (LL) environment, male cricketsA) are unable to maintain a regular cycle of calling.
B) call continuously throughout the day due to the constant light input.
C) maintain a daily cycle of calling and noncalling that starts slightly later each day.
D) reset their calling cycle to start a few hours before the lights go off and continue until a few hours before the lights go on.
Answer