D. Estuaries
Estuaries are a place where fresh and salt water mix.
A. T-A-C-G-A-T
A and T pair together, and G and C pair together. There are no U’s because U’s are in RNA, not DNA.
Explanation: The allele for black is B and the allele for white is W. The heterozygous phenotype is known as erminette.
