The earth is populated mostly by single-celled organisms, such as bacteria. however, there are many multi-celled organisms as well.

which of the following is a multi-celled organism?
a.
flower
b.
human
c.
insect
d.
all of these

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.