For the shoot apical meristem of gymnosperms
Monoplex type exists
Simplex type exists
Duplex type exists
All of these exists
Types of Shoot Apex:
1. Monoplex Type: In this type of shoot apex, there is only a single apical cell that represents the shoot apical meristem. It is seen in higher algae, bryophytes and pteridophytes.
2. Simplex Type: In this type of shoot apex, there is a single layer of meristematic cells that represent the shoot apical meristem. It is seen in gymnosperms.
3. Duplex Type: In this type of shoot apex, there are multiple layers of meristematic cells that represent the shoot apical meristem. It is seen in angiosperms.
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Simplex Type of shoot apical meristem is seen in gymnosperms.