This is true! Heterozygous would be Dd, and the dominant masks the recessive
3.91 is the correct answer
D. similar number of nuetrons
Oil makes it impossible for fur-bearing mammals to insulate<span>, this leaves them unprotected from the harsh elements out in the water. Birds and mammals will die from hypothermia without the ability to insulate from the freezing water.
I hope this helps you! :-)</span>