Which of these is not a feature that links "dinosaurs' to modern day extant birds"?
a. a furcula
b. feathers
c. s-shaped neck
d. nasal turbinates
e. the flight stroke

The correct answer is option d. "Nasal turbinates".

Explanation:

Most mammals and modern day birds have nasal turbinates that perform two functions: improve the sense of smell by providing a wider area for airborne chemicals absorption and warm and moisten inhaled air while extracting heat and moisture during air exhalation. On the other hand, no evidence have been found that suggest that dinosaurs had nasal turbinates. Although most dinosaurs had nasal passages, they were too narrow and short to accommodate nasal turbinates.