Which of the following would not be seen in a cross section through the woody part of a root? a. sclerenchyma cells b. parenchyma cells c. sieve-tube elements d. root hairs

Verified step by step guidance

1. Identify the function and location of each cell type mentioned in the options.
2. Understand that sclerenchyma and parenchyma cells are common in many parts of the plant, including roots, for structural support and storage.
3. Recognize that sieve-tube elements are part of the phloem, which is involved in the transport of nutrients and can be found in the woody part of roots.
4. Recall that root hairs are extensions of root epidermal cells, primarily involved in absorption of water and nutrients from the soil.
5. Conclude that root hairs are not typically found in a cross section of the woody part of a root, as they are located on the surface of young roots and not within the woody, internal structure.

Key Concepts

Woody Root Structure

Woody roots are characterized by their complex structure, which includes various types of cells that provide support and storage. The primary tissues found in woody roots include xylem, phloem, and various types of ground tissue, such as parenchyma and sclerenchyma. Understanding the arrangement and function of these tissues is essential for identifying what can be seen in a cross-section.

Cell Types in Roots

Roots contain several specialized cell types, including sclerenchyma cells, which provide structural support, and parenchyma cells, which are involved in storage and metabolic functions. Sieve-tube elements are part of the phloem and are responsible for transporting nutrients. Recognizing these cell types helps in determining their presence or absence in a cross-section of woody roots.

Root Hairs

Root hairs are specialized extensions of root epidermal cells that increase the surface area for water and nutrient absorption. They are typically found near the root tips and are not present in the woody part of the root, which is more mature and has a different function. Understanding the role and location of root hairs is crucial for answering questions about root anatomy.