Why is the ozone layer important to living organisms?

The hole in the ozone layer is improving the Earth's condition.
It provides oxygen for anaerobic bacteria.
It prevents too many of the sun's UV rays from reaching Earth.
All of the above.

Answer

The answer is, "It prevents too many of the sun's UV rays from reching Earth"

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

hope this

b is dominant over the allele for the white fur.