Answer to Question #211966 in Civil and Environmental Engineering for Nickname

Question

1. Why are the sutures of the ammonite shell one of the most important features of the organism?​
2. Which bioevent saw the demise of the graptolites and in which geologic period did this occur?​

Answer 1

i)Because sutures help in resisting stress caused by hydrostatic pressure.

ii) A general reduction of the planktonic biomass, and the phytoplankton component on which the graptolites probably fed and the rise of the land plants was responsible for the extinction of the graptolites. The extinction occurred in the Early Devonian (Pragian) times.