Answer:
which of the following correctly orders part of a fish respiratory system from the least complex to most complex
cells- tissues- gills
Step-by-step explanation:
Part of fish from the least complex to the most complex, since every life begins from the cell level. This shows that cell is the least complex, while aggregation of cells forms the tissues follow by the gills which is an organ and they are formed by aggregation of tissues
cells- tissues- gills