It takes a great deal of nonscientific, dogmatic inflexibility to believe that something as complex as a ribosome and yet as essential to all cellular life, could come into being on its own. The parts of this machine must not only all be there for it to do its job, but they all must be in working order. No cells could live long without their jobs being done. Ribosomes have been called construction sites and factories; they make the proteins that cells utilize in almost all their structures and the enzymes that operate ubiquitously throughout the cells and cell systems catalyzing the chemical works of life.
Hemoglobin is an example: it is a ribosome constructed protein utilized in blood cells to capture and carry oxygen throughout many cellular systems. Even the proteins in a ribosome are made by ribosomes, as well as the proteins in helicase and polymerase whose job it is to preserve and produce reliable blueprints and work orders for ribosomal operations. Ribosomes are two piece machines that assemble around their blueprints of mRNA to do their work. Their parts are composed of ribosomal RNA (rRNA), and different proteins. Their structural rRNA and proteins vary from part to part: one of the parts with rRNA 1,500 nucleotides in length and 20 different proteins, and the other with rRNA some 100 and some 3,000 nucleotides long and 35 different proteins. Nucleotide sequence is as critical to RNA as amino sequence is to functional proteins. This machine requires 55 proteins and conservatively 10,000 nucleotides of rRNA.
Chance construction is out of the equation, scientifically anyway. In a billion universes like our own and 100 billion years the chance probability is still zero. These kinds of arrangements do not happen by chance; this is engineering and design; it just happens to be way beyond our intelligence. It is instructing us. And that awes us. Even the construction of ribosome, first in the nucleolus for framing and then out in the cytoplasm for finishing under what must be numerous controls, magnifies the order of complexity and presupposes coevality of these structures. These DNA, RNA, protein systems are not reducible among their individual parts, products, and services.
Therefore it seems reasonable to assume their simultaneous creation inside each of the first cells after their kinds and guaranteeing the perpetuity of their kinds.