The answer is, d. consists of circular DNA molecule . The circular DNA is found in bacterias and archeas (which are prokaryotic organisms). The picture shows bacterial chromosome.
Temporal isolation , behavioral isolation, and geographical isolation I hope I answered your question if not please try searching up or using further sources
I think the respiratory system and circulatory system
The ventral visual stream projects to the inferior temporal cortex and is involved in the perception of form. While the dorsal visual stream projects to the parietal association cortex and is involved in the analysis of spatial location. the ventral visual stream is a pathway that stretches from the primary visual cortex in the occipital lobe forward into the parietal lobe.