Step-by-step explanation:
The organisms arranged according to their increasing complexity would be as follows:
- Spirogyra (a type of green algae)
- Moss plant (a non-vascular plant)
- Fern (a vascular plant)
- Maize (a flowering plant)
- Groundnut (a flowering plant)
- Whistle pine (assuming you meant "whistle pine" to refer to a coniferous tree)
[This arrangement is based on the complexity of their genetic makeup, structural organization, and reproductive strategies.]