20 Points - BIOLOGY Which of the following best describes an example of how genetic codes of organisms have been used to help hierarchically classify living things?

The common nucleic acid sequences of polar bears and black bears can be deduced from their classification in the same genus, Ursus.
Viruses contain DNA which is used to classify which hosts they will infect into a Linnaean taxonomy of viruses.
Since kangaroos and opossums both have developed pouches to carry their young, it proves that they share DNA sequences and belong to the same species.
Even though Eubacteria and Archaebacteria look similar, differences in their ribosomal RNA led to their classification into different domains.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

answer; i believe the correct answer is (a)0

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.