Which primitive organic molecule was essential to form lipid bilayer?​

Which of the following conclusions can be drawn

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.

What type of cell division is used to replace old cell?