Organism and organ system
Answer:
Vascular tissue includes xylem, phloem, parenchyma, and cambium cells.
I believe the ratio of C to H to O in simple sugars or monosaccharides are 1 C : 2 H : 1 O or 1:2:1.
I think all of them provide strong evidence, but the best would probably be the last one.
Hope this helps
