Dear Daniel, I hope you are fine and well. I’m really fascinated, hearing your very interesting and unique question which was seldom asked before. As much as I know, here is my response.
Before going in the details of the answer, I want to tell you one very interesting fact about the camels nomenclature. One hump camel is dromedary (D) camel, if you rotate D towards left side, it will make one hump. The 2 humps camel is Bactrian (B), if you rotate B to left side it will make 2 humps.
I’m sure that you know Bactrian camel lives in the region which is one of the harshest and coldest terrains on the earth, one of the coldest and driest deserts. The Hump is actually a gift of nature to the camels to adapt and survive in the hardiest and challenging ecosystems. The humps provide energy and water when there is no vegetation for food. As the Bactrian camels live in the ecosystem which has prolonged dry and prolonged cold weathers, they need double treasure of fats to cope such challenging weathers.
The dromedary has one as it is enough for the dry conditions of the year but the other hump is missing because there is not harsh cold weather in its ecosystem.
Camel has got a very special body, physiology and behaviors to not only survive in harsh climatic conditions but to provide food and accessibility to its keepers.
I hope you have got your answer. For further details you can contact me anytime again.