Here are some key characteristics of woody stems:
* Hard and rigid: Woody stems provide structural support for the plant, allowing it to grow tall and withstand harsh conditions.
* Long-lived: Woody stems can live for many years, allowing the plant to grow and reproduce over extended periods.
* Often branched: Woody stems typically branch, creating a complex structure that maximizes surface area for photosynthesis and reproduction.
* Presence of bark: The outermost layer of a woody stem is called bark, which protects the plant from damage and disease.
Examples of plants with woody stems:
* Trees
* Shrubs
* Vines
Key takeaway: The presence of secondary xylem is the defining characteristic of a woody stem. This tissue gives the stem its strength and allows the plant to grow tall and live for many years.