Which statement best describes why warm ocean currents are usually surface currents?

a) warm water is less dense than cold water.

b) ocean tides bring warm water to the surface.

c) warm water contains more salt than cold water.

d) ocean water loses heat to the air at the surface

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.