Explanation:
In cycas, rachis and leaflets have a diploxylic arrangement in vascular bundles.
- Diploxylic means an arrangement of vascular bundle, where two types of xylem are present. These are centripetal xylem and centrifugal xylem.
The xylem and phloem, two types of vascular tissue, are combined to produce the vascular bundle, a transport mechanism in vascular plants.
While phloem mostly carries specific organic substances, xylem primarily carries water and a few nutrients.