Which of the following is false concerning melatonin?
A) Exposure to light inhibits production.
B) Exposure to light stimulates production.
C) It inhibits releases of GnRH.
D) It is produced by pinealocytes.
E) It is made from serotonin.
B
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ATP is a nucleotide that is composed of
A. adenosine, deoxyribose, and three phosphorous atoms. B. arginine, thymidine and three phosphorous atoms. C. adenine, thymine, and three covalently bonded phosphate groups. D. adenine, ribose, and three covalently bonded phosphate groups. E. adipose, thymine, and three phosphate groups linked by ionic bonds.
The carrier protein that transports absorbed iron through the blood is
A) hemoglobin. B) intrinsic factor. C) thrombopoietin. D) erythropoietin. E) transferrin.
Write the correct spelling for each of the following. brackeesefalick
What will be an ideal response?
Callopistes maculatus, the dwarf tegu, is a teiid lizard that occurs in desert habitats in Chile
A study of its daily activity cycle in summer showed a decrease in activity during midday, although the body temperatures of the lizards that were active in midday were not different from the body temperatures of lizards that were active in the morning or afternoon. That observation is not consistent with the hypothesis that midday temperatures are so high that the lizards must seek shelter to avoid overheating. Apparently dwarf tegus in this habitat are able to maintain their normal activity body temperatures throughout the day. What alternative hypothesis can you suggest to account for the decrease in activity of dwarf tegus in midday? If your hypothesis is correct, what additional concern does it suggest about the potential effect of global climate change on lizards?