After a biology field trip,you make a thin section of a flowering plant stem.You observe these two main sets of cells: the lower set of cells are large,have thick walls,and test positive for the lignin molecule,while the smaller,but uniform red cells do not have lignin.From this evidence,you conclude that the larger cells with lignin are

Question

Quizplus · Accepted Answer

The larger cells with thick walls that test positive for the lignin molecule are characteristic features of xylem cells. Xylem cells transport water and minerals from the roots to other parts of the plant, and their thick walls with lignin provide structural support to the stem. The smaller, uniform red cells are likely to be either parenchyma or collenchyma cells that provide metabolic and mechanical support to the stem. Cuticle, stomata, and rhizoids are not relevant to this observation. Phloem cells transport organic compounds, but they typically do not have thick walls with lignin.

After a Biology Field Trip,you Make a Thin Section of a Flowering