Which one of these protein structures shows the folding of the polypeptide which is held in place by interactions between R groups by H, ionic, and covalent bonds as well as strong disulfide linkages.

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?