You are an evolutionary biologist working for the Smithsonian. On a fossil dig in the eastern Montana Badlands, you discover fossil evidence that shows the earliest eukaryotic cells contained only free-floating ribosomes. Briefly state what conclusion(s) could be drawn from this evidence.?

You may infer that primitive eukaryotic cells were made up of proteins that exhibit a function inside the cytosol.

Explanation:

The free-floating ribosomes are those ribosomes that remains free in the cytosol these are not bound to the endoplasmic reticulum. This was the primitive feature in the eukaryotic organisms. The free-floating ribosomal  proteins are utilized within the cell. These proteins are used for the metabolism of food. The free ribosomes produce enzyme that are responsible for the metabolism of the glucose.

the answer is d. chordata