Glycogen.
Glycogen is a multibranched polysaccharide that serves as a form of
energy storage in animals. They're stored inside the liver and muscles.
CO2 traps heat in the atmosphere of the earth which leads to global warming because of the green house effect
I dunno ♀️ sorryyyyyyyyyy
No. Medical progress is allowing us to progress and evolve in different ways. That is the only difference. Having medical progress and good medical care allows us to pursue different types of activites we wouldn't be able to pursue otherwise. This at the same time brings a different type of evolution.