A camel's hump is a structural
adaptation, but the

adaptation enables a camel to survive longer without drinking water,
behavioral
physiological
structural

he kidneys of a camel have a long loop of Henle, which increases the osmolality of urine. When the camel is dehydrated, the kidneys reduce the loss of water by decreasing the rate of filtration while at the same time increasing the reabsorption of water.

Explanation:

Blank 1 is Structural

Blank 2 is Physiological

Explanation:

A camel’s hump is a (structural) adaptation, but the (physiological) adaptation enables a camel to survive longer without drinking water.

yellow fever and other tropical diseases

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.