Formed by the apical meristem and the cells right behind it. If they were in the zone of elongation they d be ripped off o They are produced and die off at about the same rate These cells are no longer increasing in size but are going through differentiation 3. In monocots, the primary root dies back quickly, and adventitious roots grow from the stem. These produce fibrous roots all similar in size. Primary growth in shoots As we just saw, roots are fairly simple structures which grow only at their tips.
Shoots are more complex.
A. Shoot structure 1. Located at the tips of shoots, usually protected by young leaves 2. The growth may occur throughout the internode, or primarily in one area 5. The area of ground tissue just above where the leaf trace diversges is called the leaf trace gap 2. Just as there are leaf traces, branch traces connect the vascular tissue of the main stem with that of the branc developing in the axil of the leaves B. Stem thickening in primary growth 1.