Three billion years ago, earth's atmosphere was very different. it included the gases methane and ammonia. if scientists found a new planet outside our solar system that had an atmosphere similar to earth's three billion years ago, what kingdom's organisms would you expect the new planet's organisms to resemble?

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.