Write a 12,000- to 12,500-word paper, describing primary and secondary growth in plants and the journey of water and sugar molecules in plants. Include the following points and principles:
Primary and Secondary Cells and Tissues in Plants
The three types of plant cells are parenchyma, collenchyma, and sclerenchyma. For each, discuss the basic structure, function, the different types for parenchyma and sclerenchyma, and where in the plant they can be found.
Include a picture of a cross section of a stem. Label the following structures and then describe each of the following: epidermis, cutin, cuticle, guard cells, stomata, cortex, and vascular bundles.
What is the function of a lenticel? How are intercellular spaces important for this function?
Include a picture of a stem and label the nodes, internodes, apical meristems, leaf buds, and flower buds.
Describe growth by apical meristems.
Include a picture of a cross section of secondary growth in a woody species. Label the primary xylem and phloem, secondary xylem and phloem, fascicular cambium, and interfascicular cambium.
In woody species, aIDitional tissues are produced in the stem and root by two aIDitional meristems. Name these meristems, and describe how they aID secondary growth to the plant.
Water, Sugar, and Mineral Transport in Plants
Explain how each of the following mechanisms transports substances within the plant: symplast, osmosis, molecular pumps in the membranes, transport vesicles fusing with the plasma membrane, apoplast, and transfer cells.
Describe the costs and benefits of transpiration for plants.
Describe how glucose (sugar) is transported within a plant. Use the terms sieve cells, sieve tube members, companion cells, sieve pores, sieve areas, pressure flow hypothesis, sources (provide examples), sinks (provide examples), STM/CC complex, and osmotic potential in your response. Highlight these terms within your answer.
Explain how water and minerals are absorbed and transported by the root system into the xylem and from the xylem into leaves.
Include the terms xylem, tracheids, vessel elements, pit membranes, vessel, adhesion, cohesion, cohesion-tension, and transpiration.
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