BI-767
Xylem and phloem
Biology · Secondary 3 · Medium · Xylem and phloem
Why does a land plant need more lignified xylem in its stem than a similar-sized water plant?
- To provide extra mechanical support since air gives little buoyancy
- To increase the rate of photosynthesis in the stem
- To prevent water entering the stem by osmosis
- To make the stem more flexible for bending in water
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