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Which of the following is/are produced by the vascular cambium? Select all that apply. 1) Primary growth 2) Secondary xylem 3) Growth rings in wood 4) Secondary phloem
Which of the following is/are produced by the vascular cambium? Select all that apply.
1) Primary growth
2) Secondary xylem
3) Growth rings in wood
4) Secondary phloem
Answer
The following are produced by the vascular cambium:
- Secondary xylem
- Secondary phloem
Explanation:
- Secondary xylem: Correct. The vascular cambium produces secondary xylem toward the interior of the stem, which contributes to the plant’s structural support and water transport.
- Secondary phloem: Correct. The vascular cambium produces secondary phloem toward the exterior of the stem, which is involved in the transport of nutrients and organic compounds.
- Growth rings in wood: Partially correct. The vascular cambium contributes to the formation of growth rings by producing secondary xylem and phloem. However, the rings themselves are a result of seasonal variations in growth, not a direct product of the cambium.
- Primary growth: Incorrect. Primary growth, which increases the length of the plant, is driven by apical meristems, not the vascular cambium. The vascular cambium is involved in secondary growth, which increases the girth of the plant.
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