The R group or side chain of the amino acid threonine is highly polar. The R group or side chain of the amino acid leucine is highly nonpolar. In what location on the tertiary structure of a protein would you expect to find these amino acids?

A) Both threonine and leucine would be on the exterior of the protein.

B) Both threonine and leucine would be in the interior of the protein.

C) Threonine would be on the interior, and leucine would be on the exterior of the protein.

D) Leucine would be on the interior, and threonine would be on the exterior of the protein.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.