What contributions did Darwin, Lamarck, Lyell, Malthus, Mendel, and Wallace provide to the development of the scientific theory of evolution?

Dna replication is called semiconservative because a. no extra nucleotides are incorporated into the replicated dna molecules. b. both of the resulting dna molecules are composed of new strands of nucleotides. c. the two resulting dna molecules each have one new dna strand and one old strand from the original dna molecule. d. the sequence of nucleotides in one strand is conserved, whereas the new dna molecule consists of a unique sequence of nucleotides.