Two chickens are bred and produce the following numbers of offspring. What are the most likely appearances of the parents?
Table of offspring
A. Both parents have red/white feathers.
B. Both parents have white feathers.
C. One parent has white feathers, and one parent has red/white feathers.
D. One parent has white feathers, and one parent has red feathers.

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)