If there are 2000 nucleotides in a strand of dna and 600 contain the nitrogen base cytosine, how many nucleotides contain adenine?

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

What organelle other than the nucleus houses dna in a eukaryotic cell?

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations