Organisms in the same ecosystem are all

When organisms are classified ,they are given a two part name

Are the layers of rock above and below the coal older or younger?

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.