1. The anomalous stem structure of Chenopodium album is produced by a periodically active cambium which forms xylem centripetally throughout its extent and phloem centrifugally in restricted regions.

Save guides, add subjects and pick up where you left off with your BBC account. Phloem consists of living cells. The cells that make up the phloem are adapted to their function: ...

Save guides, add subjects and pick up where you left off with your BBC account. The phloem moves food substances that the plant has produced by photosynthesis to where they are needed for ...