Radioisotopes tell scientists that earth is how old? a. 65 million years b. 500 million years c. 4.5 billion years d. 13.4 billion years

Scientific evidence is most likely to be consistent if it is based on data from

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.

Besides regulating what enters and leaves the cell, what is another function of your choice from question #1?