LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
11th Edition
ISBN: 9781319209957
Author: Sadava
Publisher: MAC HIGHER
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Chapter 33.2, Problem 2R
Summary Introduction
To review:
The reason why tissues made of collenchyma cells are more flexible than those made of sclerenchyma cells.
Introduction:
The tissue, which is present between dermal tissue and vascular tissue in shoots, as well as roots, is known as the ground tissue. These tissues have three kinds of cells, including sclerenchyma, parenchyma, and collenchyma.
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Like clay, walls of collenchyma exhibits plasticity. Does that mean it can or cannot be stretched? If a tissue is supported by collenchyma, can it still grow?
Differentiate parenchyma, collenchyma, and sclerenchyma cells.
Define the importance of Parenchyma cells ?
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- Locate the sclerenchyma tissue.arrow_forwardImagine a leaf of a palm tree. When it is fully grown, it must have sclerenchyma to support its size and weight. Do you think it has any sclerenchyma when it is tiny and just starting to grow? Would you expect that it might have collenchyma when it is medium sized and still growing?arrow_forwardwhich of the following best describes the parenchyma tissue? a. cells with moderately thick walls for flexibility b. cells with very think walls with lignin for strength and support c. cells that are long with tapered ends and cell walls with pits d. cells that long and thin with large pores at their ends e. cells with large spaces for water storagearrow_forward
- What is the meaning of the term parenchyma and stoma as they relate to body organs ?arrow_forward5) Match the tissue name on the left with the description that best matches the structure of cells making up that tissue on the right: a) collenchyma cells are round, have very thin walls, and are alive at maturity. b) phloem cells have relatively few organelles and are hollow. c) parenchyma cells have thin walls and sometimes secrete a waxy substance. d) xylem cells have thick secondary cell walls reinforced with lignin. e) epidermis cells are long with a primary cell wall that is thickest at the ends of the cell, but no secondary cell wall. f) periderm cells are long and thin, hollow, with pits lining the sides of the cells. g) sclerenchyma some cells of this tissue have thick cell walls, whereas other cells of this tissue do not. 6) Match the tissue on the left with the description of the function it generally performs for the plant on the right: a) phloem flexible support, such as in petioles and herbaceous stems. b) xylem forms an outer barrier for leaves, young stems and roots.…arrow_forwardWhat structural features of guard cells foster their ability to form anopen pore in plant epidermal surfaces?a. thickened inner cell walls and radially oriented microfibrilsb. thickened outer cell walls and radially oriented microfibrilsc. thickened inner cell walls and longitudinal microfibrilsd. thickened outer cell walls and longitudinal microfibrilse. uniform thickness of cell walls and randomly arrangedmicrofibrilsarrow_forward
- Determine the collective true-false status of the statements using the choices below. I. Collenchyma cells stay alive in mature tissue.; II. Variably shaped cells of sclerenchyma die when they are mature.; III. The thick cell walls of sclerenchyma contain a high proportion of durable compounds such as pectin which lend sturdiness to plant parts and help them resist stretching and compression.; IV. In collenchyma, chitin imparts flexibility to these cells’ primary wall, which is thickened unevenly where three or more of the cells abut one another. All statements are true. Only three (3) statements are true. Only two (2) statements are true. Only one (1) statement is true. None of the statements is true.arrow_forwardIs it Callous Stem Vascular or Collenchyma Tissue ?arrow_forward22) the function of stem cells in this region of a tissue is to increase the number of cells that go on to differentiate into parenchymal cells a) transmit amplifying zone b)organizer zone c) parenchymal cell zone d) all of these e) none of thesearrow_forward
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