Match the stele-type with its description.
- A. B. C. D. Protostele
- A. B. C. D. Siphonostele
- A. B. C. D. Eustele
- A. B. C. D. Dispersed stele
A. The xylem forms an uninterrupted cylinder within a cylinder of phloem; found in the stems of very simple seedless vascular plants.
B. A cylinder of phloem surrounds a cylinder of xylem which surrounds another cylinder of phloem, with a pith of parenchyma cells at the center; found in the stems of ferns and fern allies.
C. The stele is broken into vascular bundles that are arranged in a ring with the phloem on the outside and the xylem on the inside; commonly found in gymnosperms and dicots.
D. The stele is broken into vascular bundles that are scattered in cross section so that the orientation of xylem and phloem is inconsistent from vascular bundle to vascular bundle; found in monocots.
Match the stele-type with its description.
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