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Answer: 1. Grasses

Secondary growth depends on a vascular cambium, which is weak or absent in monocots.

Grasses are monocots with closed vascular bundles and so show little or no secondary growth. Conifers, deciduous angiosperms (dicot trees) and cycads show clear secondary growth.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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