What is the author's purpose?
to motivate people to become researchers
to convince people that solar energy is needed
to criticize nuclear energy
to defend solar energy

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.