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Review the image of the Coleus stem tip, longitudinal section, in Exercise 4.2, then answer the questions below: Describe the changes in cell size and structure in the stem tip. Begin with the youngest cells at the apex (tip) and continue to the xylem cells.

Review the image of the Coleus stem tip, longitudinal section, in Exercise 4.2, then answer the questions below: Describe the changes in cell size and structure in the stem tip. Begin with the youngest cells at the apex (tip) and continue to the xylem cells.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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**Section: Plant Primary Growth and Development** **Instructions:** Review the image of the Coleus stem tip, longitudinal section, in Exercise 4.2, then answer the questions below: Describe the changes in cell size and structure in the stem tip. Begin with the youngest cells at the apex (tip) and continue to the xylem cells.
Transcribed Image Text:**Section: Plant Primary Growth and Development** **Instructions:** Review the image of the Coleus stem tip, longitudinal section, in Exercise 4.2, then answer the questions below: Describe the changes in cell size and structure in the stem tip. Begin with the youngest cells at the apex (tip) and continue to the xylem cells.
### Figure 7.2: Coleus Stem Tip Longitudinal Section This image shows a microscopic view of a Coleus stem tip in longitudinal section. The following parts are labeled: - **Shoot Apical Meristem:** This is the region at the tip of the plant shoot that contains undifferentiated cells capable of division and growth. - **Undifferentiated Vascular Tissue:** These are the cells that will eventually differentiate to form vascular tissues like xylem and phloem. - **Young Leaf:** This is a newly developing leaf, which originates from the shoot apical meristem. - **Developing Vascular Tissue:** These cells are in the process of differentiating into the plant’s vascular system, which is responsible for transporting water, nutrients, and sugars. - **Axillary Bud Meristems:** Located in the axils of leaves, these are regions of cells that can give rise to branches or flowers. Make sure you can identify and label these parts for further understanding and potential quiz assessments.
Transcribed Image Text:### Figure 7.2: Coleus Stem Tip Longitudinal Section This image shows a microscopic view of a Coleus stem tip in longitudinal section. The following parts are labeled: - **Shoot Apical Meristem:** This is the region at the tip of the plant shoot that contains undifferentiated cells capable of division and growth. - **Undifferentiated Vascular Tissue:** These are the cells that will eventually differentiate to form vascular tissues like xylem and phloem. - **Young Leaf:** This is a newly developing leaf, which originates from the shoot apical meristem. - **Developing Vascular Tissue:** These cells are in the process of differentiating into the plant’s vascular system, which is responsible for transporting water, nutrients, and sugars. - **Axillary Bud Meristems:** Located in the axils of leaves, these are regions of cells that can give rise to branches or flowers. Make sure you can identify and label these parts for further understanding and potential quiz assessments.
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Primary growth is a conclusion of rapidly-dividing cells in the apical meristems at the shoot tip & root tip. Subsequent cell elongation also helps for primary growth.

The influence of the apical bud on overall plant growth is called apical dominance, which prevents the growth of axillary buds that form on the sides of branches & stems.

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