Biology: Concepts and Applications (MindTap Course List)
10th Edition
ISBN: 9781305967335
Author: Cecie Starr, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 25, Problem 1CT
Summary Introduction
To determine:
The reason behind the absence of waxy cuticle in roots.
Introduction:
The aboveground surfaces of the plants are covered with a waxy layer of the cuticle. Presence of a cuticle layer provides some specialized surface properties to the plants. Roots of the plant lack this layer.
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Aboveground plant surfaces are typically covered with cuticle. Why do roots lack this protective coating?
Explain the reason why the roots lack the protective covering like the plant surface which
has a waxy cuticle.
Why is it that the wall of the epidermis in the root area has no cuticle and has thin walls?
Chapter 25 Solutions
Biology: Concepts and Applications (MindTap Course List)
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- The mature regions of roots are relatively impermeable to water. Why? Explain its importance.arrow_forwardA few layers of thick walled parenchymatous cells, which lie below the endodermis in dicot root is called Conjuctive tissue Pericycle Casparian strips Hypodermisarrow_forwardWhy can xylem transport water and minerals using deadcells, whereas phloem requires living cells?arrow_forward
- dicot examine the type of stomata in relation to the arrangement of epidermal cells present. identify the stomata exhibited label the ordinary epidermal cells (pavement cells), subsidiary cells, guard cells, and stomatal pore.arrow_forwardWhy does a layer of periderm offer only temporary protection? When the plant makes a new layer of cork cambium, does it make the new layer to the outer side of the failing periderm or to the inner side of it, deeper in thesecondary phloem?arrow_forwardShow the sequence of secondary growth by drawing the row of cells from the boxed area below and labeling the vascular cambium cell (V), 5 xylem cells from oldest (X1) to youngest (X5), and 3 phloem cells (P1 to P3). Show what happens after growth continues by drawing and labeling a row with twice as many xylem and phloem cells. How does the vascular cambium’s location change? A pear has a hard texture but juicy. State two cells that give the characteristics? State the function of the transitional epithelium found in the mammalian urinogenital system. (i) Identify type of tissue lines the air sacs of the lungs. (ii) Explain how the tissue named in (i) adapted to its function.arrow_forward
- Choose the correctly matched among the following A) Epidermal tissue system – Root hairs B) Collenchyma – Dead cells C) Fibres – Water conduction D) Meristem – Fruit wallsarrow_forwardSecondary growth in stems involves two meristems. Identify and describe these two meristems, explain what tissues they are responsible for producing (including their functions), and explain the direction of cell division in which those tissues are produced in relation to the epidermis. For the last part of this question referring to the direction of cell division, make sure to address why cell division is occurring in two different planes. Also, as part of your answer, name and explain the functions of the tissues from the center of the stem to the dermal layer, in order, for a stem conducting secondary growth.arrow_forwardIt was previously stated that parenchyma cells are relatively inexpensive to build. What does that mean? How does this relate to most leaves being soft?arrow_forward
- What is the function of the root hairs? Describe the relationship between root hairs and the epidermal cells of a root (you might need to review your text for this).(+read the text passage p.29.15-15t Ed. p.614~2nd Ed. p.608 - 314 Ed. on the benchyarrow_forwardWhich of the following statements are true for root endodermis?I. Endodermal cells constitute the innermost layer of root cortex and surrond the vascular cylinder (xylem and phloem). II. Endodermal wall is covered with waxy layer of casparian strip which blocks apoplastic transfer of minerals.III. Due to presence of casparian strip, water and minerals can only eneter the vascular cylinder if they will be able to cross the plasma membrane of an endodermal cell.arrow_forwardExplain why the vascular cambium forms acontinuous sheath that runs from near the tips of thebranches to near the tips of the roots, whereas the corkcambium is discontinuous in both space and time.arrow_forward
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