What the flux? The evolution of oxygen cascades (Ep 86)

Big Biology

Art Woods, Cam Ghalambor, and Marty Martin, Art Woods, Cam Ghalambor, and Marty Martin द्वारा प्रदान की गई सामग्री. एपिसोड, ग्राफिक्स और पॉडकास्ट विवरण सहित सभी पॉडकास्ट सामग्री Art Woods, Cam Ghalambor, and Marty Martin, Art Woods, Cam Ghalambor, and Marty Martin या उनके पॉडकास्ट प्लेटफ़ॉर्म पार्टनर द्वारा सीधे अपलोड और प्रदान की जाती है। यदि आपको लगता है कि कोई आपकी अनुमति के बिना आपके कॉपीराइट किए गए कार्य का उपयोग कर रहा है, तो आप यहां बताई गई प्रक्रिया का पालन कर सकते हैं https://hi.player.fm/legal।

2y ago 1:14:04

MP3•एपिसोड होम

How do we properly study complex traits? How does organismal function relate to how organisms evolve?

All animals use oxygen to convert sugars and other substrates into energy using a multi-step pathway called the oxygen cascade. This cascade involves many, many parts of the respiratory, circulatory, and metabolic systems, making it a complex trait. Complex traits pose at least two major challenges to biologists: how do such multifaceted systems operate effectively and how do they evolve in the first place. Where does selection act in such systems: on the whole thing, on individual parts, or on the genes that underpin the functions of parts?

On this episode, we talk to Graham Scott, a physiologist from McMaster University who studies the oxygen cascade in mice living on mountaintops, extreme environments for such small organisms. We discuss the concept of symmorphosis, the function and evolution of the oxygen cascade, and several clever experiments involving rat marathons and mighty mountain mice.

Cover art: Keating Shahmehri

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