Why does DNA have the same structure that is replicated in the same way in all cells - bacterial, protist, fungal, plant, and animal?
a. This is the most efficient structure and method of replication for a molecule that stores inherited information.
b. DNA structure and replication evolved independently in each lineage - bacteria, protist, fungi, plant, and animal.
c. DNA structure and replication was inherited from an ancestor shared by all organisms on Earth - an early cell that evolved this structure.
d. All of the above are correct explanations.