question 12\nfound exclusively in equatorial regions such as the democratic republic of congo, wild bonobos…

question 12\nfound exclusively in equatorial regions such as the democratic republic of congo, wild bonobos have no physiological mechanisms for coping with seasonal fluctuations in ultraviolet a (uva) radiation from sunlight; because uva exposure allows mammals to regulate circadian melatonin cycles, this prompts concern about how bonobos housed in high-latitude sanctuaries are affected by the diminished and more variable uva radiation at those latitudes. in a study of sanctuary bonobos in sweden and other high-latitude nations, jakob lindgren and colleagues found not only that bonobos melatonin regulation correlates with uva radiation but also that melatonin stability shows no sign of leveling off as uva radiation reaches its peak seasonal values, suggesting that ______\n\nwhich choice most logically completes the text?\na) physiological adjustments to seasonal fluctuations in uva radiation may be developing in sanctuary bonobos in sweden and other high-latitude nations.\nb) sanctuary bonobos in sweden and other high-latitude nations tend to achieve less stable melatonin regulation than they are inherently capable of achieving.\nc) administering supplemental melatonin to bonobos in sanctuaries in sweden and other high-latitude nations would likely yield no measurable benefit.\nd) averaged across seasons, melatonin stability in sanctuary bonobos in high-latitude nations such as sweden tends to be comparable to that in wild bonobos in equatorial regions such as the democratic republic of congo.

question 12\nfound exclusively in equatorial regions such as the democratic republic of congo, wild bonobos have no physiological mechanisms for coping with seasonal fluctuations in ultraviolet a (uva) radiation from sunlight; because uva exposure allows mammals to regulate circadian melatonin cycles, this prompts concern about how bonobos housed in high-latitude sanctuaries are affected by the diminished and more variable uva radiation at those latitudes. in a study of sanctuary bonobos in sweden and other high-latitude nations, jakob lindgren and colleagues found not only that bonobos melatonin regulation correlates with uva radiation but also that melatonin stability shows no sign of leveling off as uva radiation reaches its peak seasonal values, suggesting that ______\n\nwhich choice most logically completes the text?\na) physiological adjustments to seasonal fluctuations in uva radiation may be developing in sanctuary bonobos in sweden and other high-latitude nations.\nb) sanctuary bonobos in sweden and other high-latitude nations tend to achieve less stable melatonin regulation than they are inherently capable of achieving.\nc) administering supplemental melatonin to bonobos in sanctuaries in sweden and other high-latitude nations would likely yield no measurable benefit.\nd) averaged across seasons, melatonin stability in sanctuary bonobos in high-latitude nations such as sweden tends to be comparable to that in wild bonobos in equatorial regions such as the democratic republic of congo.

Answer

Brief Explanations:

The text states wild bonobos have no physiological mechanisms for seasonal UVA fluctuations, but sanctuary bonobos' melatonin regulation correlates with UVA and doesn't level off at peak UVA. This implies their melatonin regulation is adapting to the new UVA conditions in high latitudes. Option B contradicts the finding that their regulation correlates with UVA. Option C is unsupported as no mention of supplements is made. Option D is incorrect because wild bonobos don't have regulated melatonin cycles for seasonal UVA, so sanctuary ones can't be comparable. Only option A logically follows, as their melatonin response to variable UVA suggests developing physiological adjustments.

Answer:

A) Physiological adjustments to seasonal fluctuations in UVA radiation may be developing in sanctuary bonobos in Sweden and other high-latitude nations.