From an image of transverse slides of primary and secondary dicot roots on demonstration, determine from what tissues does the vascular cambium and cork cambium arise?
From an image of transverse slides of primary and secondary dicot roots on demonstration, determine from what tissues does the vascular cambium and cork cambium arise?
From an image of transverse slides of primary and secondary dicot roots on demonstration, determine from what tissues does the vascular cambium and cork cambium arise?
From an image of transverse slides of primary and secondary dicot roots on demonstration, determine from what tissues does the vascular cambium and cork cambium arise?
Transcribed Image Text:The image displays a series of diagrams illustrating the cross-sections of plant structures, detailing the progression from primary to secondary growth. The diagrams are labeled (a) through (d).
### Diagram (a)
- **Epidermis**: The outermost layer, providing protection.
- **Endodermis**: Located below the epidermis, controlling the flow of substances.
- **Pericycle**: A layer just inside the endodermis, involved in the formation of lateral roots.
- **Primary Phloem**: Situated toward the outer edge, responsible for transporting nutrients.
- **Cambium**: A thin layer between xylem and phloem, contributing to secondary growth.
- **Primary Xylem**: Central area, crucial for water transport.
### Diagram (b)
- **Epidermis**: Continues to form the outer layer.
- **Endodermis and Pericycle**: Similar roles as in (a).
- **Primary Phloem and Cambium**: Growth stages are visible.
- **Primary Xylem**: Arranged centrally.
### Diagram (c)
- **Epidermis and Endodermis**: Outer layers for protection and regulation.
- **Cortex**: Tissue between epidermis and endodermis.
- **Pericycle**: Aiding in root development.
- **Primary and Secondary Phloem**: Secondary phloem is now visible, indicating growth.
- **Cambial Ring**: Formed from cambium, important for secondary growth.
- **Primary and Secondary Xylem**: Indicate enhanced water transport capabilities.
### Diagram (d)
- **Epidermis**: Outer protective layer.
- **Cortex**: Supports the structure of the plant.
- **Endodermis and Pericycle**: Continuous roles as previously described.
- **Primary and Secondary Phloem**: Clearly delineated, showing developmental stages.
- **Cambial Ring**: Well-developed, reflecting active secondary growth.
- **Primary and Secondary Xylem**: Demonstrate increased structure integrity and efficiency in transport due to growth.
These diagrams demonstrate the transition from primary to secondary growth, emphasizing the development of xylem and phloem, which play critical roles in the plant's nutrient and water transport systems.
Features Features Embryos with two cotyledons. Veins in leaves form a network, and flower sections are divided into multiples of four or five. The vascular tissue in dicots is arranged in a ring in the stem, whereas in monocots, the vascular tissue is dispersed across the stem. Eudicots develop either herbaceous (like grasses) or woody tissues. Pollen from most eudicots is trisulcate or triporate, meaning it has three furrows or pores. One main root formed from the embryonic radicle normally anchors the root system.
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