Concept explainers
To explain: The number of times must each meristem cell divide to produce the 100 cells in the given observation.
Introduction: The plants are mainly multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae. The meristem is a tissue in the plants that consists of undifferentiated cells, which is capable of cell division.
Explanation of Solution
The meristem is classified by their location in the plant as lateral (in vascular and cork cambia), apical (located at shoot and root tips), and intercalary (at internodes). The root apical meristem is also called root apex. The root apical meristem is a small region at the tip of root in which all cells have the ability of repeated division and from which all the primary root tissues are derived.
Each time a meristem cell divides, one daughter cell contributes to a new tissue and others continue as meristem cell. Therefore, each meristem cell would have to divide 10 times for every 100 root cap cells that need to be replaced.
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Chapter 35 Solutions
Biology
- Look at As shown. Part (A) shows the lower half of a fusiform initial (actually most fusiform initials would be much taller than this), and part (B) shows the same cell after it has divided and one of the daughter cells is developing into a xylem cell. Did the fusiform initial divide with a periclinal wall or an anticlinal wall as it went from part a to part b? Part (D) shows that the same fusiform initial has now produced a second cell that is developing into a phloem cell. Was that phloem cell produced by a periclinal or an anticlinal division of the fusiform initial? Part (F) shows the fusiform initial dividing and forming a second fusiform initial. Is this division occurring by a periclinal wall or an anticlinal wall?arrow_forwardSketch side by side two daughter cells formed after mitosis of a meristematic cell in the vascular cambium of a eudicot stem. Label the cell formed toward the interior of the stem a meristematic cell. Should the daughter cellformed toward the outside be labeled primary xylem, primary phloem, secondary xylem, or secondary phloem?arrow_forwardIf the PIN2 gene is rendered non-functional by mutation it dramatically reduces the speed of the gravitropic response in the root. Explain what PIN proteins do and why the loss on PIN2 would likely affect the speed of the gravitropic response.arrow_forward
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- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning