7.25 Frog Adaptation [ENDORSED]

[606156544]

Hi,

This question asks about the biological advantage the difference in half-life plays between frogs and cattle. It apparently allows their vision to remain constant despite temperature fluctuations. Can someone elaborate on this in the context of what we're learning right now? I'm just a little confused and I feel like this needs additional context to answer. Thanks!

[Chem_Mod]

"Vision depends on the protein rhodopsin, which absorbs light in the retina of the eye in a reaction in which one form, metarhodopsin I, is converted to another, metarhodopsin II."

In frogs the half-life of this reaction is less temperature dependent which enables frogs to maintain their vision when it is cold, at night, etc.

[Sophia_Galstyan_3I]

Hi there, amphibians are able to regulate their temperature better than cattle since they are poikilotherms also known as cold-blooded. Therefore, the range for their half-life is much smaller (only factor of 6) versus the cattle which was almost 2000.