What are the main functions of the stem?

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(D) The stem is the ascending part of the axis bearing branches,leaves,flowers,and fruits. Its main functions include:$1$. Support: It provides struct

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(D) The stem is the ascending part of the axis bearing branches,leaves,flowers,and fruits. Its main functions include:$1$. Support: It provides structural support to the plant,holding leaves,flowers,and fruits in positions that maximize exposure to sunlight and pollinators.$2$. Conduction: It acts as a conduit for the transport of water and minerals from the roots to the leaves (via xylem) and the transport of photosynthates from the leaves to other parts of the plant (via phloem).$3$. Storage: Many stems are modified to store food (e.g.,potato,ginger).$4$. Propagation: Stems can facilitate vegetative propagation (e.g.,runners,suckers).$5$. Protection: Some stems are modified into thorns to protect the plant from herbivores.

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