Plant Supporting Tissues Quiz
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Questions and Answers

Which type of root has a star-shaped xylem?

  • Neither Dicotyledonous nor Monocotyledonous roots
  • Both Dicotyledonous and Monocotyledonous roots
  • Monocotyledonous root
  • Dicotyledonous root (correct)

Collenchyma cells have thin cell walls that provide no support to plants.

False (B)

What type of supporting tissue is characterized by thickened walls and provides rigidity?

Collenchyma

The primary function of xylem tissues is to transport __________ and mineral salts.

<p>water</p> Signup and view all the answers

Match the following types of xylem tissues with their characteristics:

<p>Tracheids = Dead cells that transport water Xylem Parenchyma = Living cells involved in storage Fibres = Provide structural support Vessels = Efficient water conduction</p> Signup and view all the answers

Which of these tissues contains cell walls thickened with lignin?

<p>Sclerenchyma (D)</p> Signup and view all the answers

The phloem tissues are responsible for transporting mainly water.

<p>False (B)</p> Signup and view all the answers

What is the characteristic feature of the cambium in dicotyledonous roots?

<p>Presence of cambium</p> Signup and view all the answers

What is the primary function of parenchyma tissues in plants?

<p>Store food and water (D)</p> Signup and view all the answers

Sclerenchyma cells are living cells that provide flexibility to plants.

<p>False (B)</p> Signup and view all the answers

What characteristic distinguishes dicotyledonous stems from monocotyledonous stems in terms of vascular bundles?

<p>Vascular bundles are arranged in rings in dicotyledonous stems and scattered in monocotyledonous stems.</p> Signup and view all the answers

The __________ is responsible for the conduction of manufactured food from the leaves to other parts of the plant.

<p>phloem</p> Signup and view all the answers

Match the following plant tissues with their primary functions:

<p>Xylem = Conducts water and mineral salts Phloem = Transports manufactured food Endodermis = Stores starch Pith = Provides rigidity in the stem</p> Signup and view all the answers

Which of the following best describes the function of the cambium in plants?

<p>Produces new xylem and phloem cells (C)</p> Signup and view all the answers

Parenchyma tissues contain chloroplasts for photosynthesis.

<p>True (A)</p> Signup and view all the answers

The __________ provides flexibility or resilience to plants.

<p>parenchyma tissues</p> Signup and view all the answers

Flashcards

Parenchyma Tissues Function

Parenchyma tissues provide support, firmness, and turgidity to plants by filling with cell sap. They also store food and water and contain chloroplasts for photosynthesis.

Sclerenchyma Tissue Function

Sclerenchyma gives flexibility, strength, rigidity, and hardness to plants, and is made of dead, lignified cells found in vascular bundles.

Vascular Bundles Function

Vascular bundles, made of xylem (water transport) and phloem (food transport), are the major transportation system of plants. The vascular cambium produces xylem and phloem.

Xylem Function

Xylem transports water and minerals from the roots to the leaves.

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Phloem Function

Phloem transports manufactured food (sugars) from the leaves to other parts of the plant.

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Dicot Stem Structure

Dicot stems have vascular bundles arranged in a ring, and a central pith region.

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Monocot Stem Structure

Monocot stems have vascular bundles scattered throughout the stem, and lack a central pith region.

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Endodermis Function

Endodermis stores starch, turning black when stained with iodine.

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Dicot Root vs Monocot Root

Dicot roots have fewer vascular bundles arranged in a star shape, and a lack of pith, while monocot roots have many vascular bundles scattered, and a present pith.

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Plant Support Tissue: Parenchyma

Parenchyma cells support plants by becoming turgid (full of water), giving them shape and support.

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Plant Support Tissue: Collenchyma

Collenchyma cells have thicker cell walls, providing rigidity to support plant structures.

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Plant Support Tissue: Sclerenchyma

Sclerenchyma cells have very thick, lignin-filled cell walls, making plants very strong and rigid.

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Xylem Tissue Structure

Xylem tissue contains long, hollow, and lignin-filled cells (dead) that transport water. They lack end walls.

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Xylem Tissue Function

Xylem tissue is responsible for transporting water and minerals throughout the plant.

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Xylem Adaptations to transport

Xylem has long, tubular cells with thick walls; this structure and its lack of cytoplasm allow for efficient water transport.

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Study Notes

Plant Supporting Tissues

  • Plant tissues provide support for the plant
  • Understanding internal structure of stems, leaves, and roots aids in understanding support mechanisms
  • Epidermis/Piliferous Layer: Outer covering (leaves/stems) and roots (piliferous layer). Protects inner cells from injury and water loss.

Plant Supporting Tissues (Cont.)

  • Cortex: Found between epidermis and vascular bundles in stems/roots. Consists of three tissues:
    • Collenchyma (outer): Provides strength and flexibility (bend without breaking)
    • Parenchyma (middle): Most abundant, provides support (when vacuoles full of cell sap), firmness (turgidity), storage (food and water). Also contains chloroplasts (photosynthesis) and intercellular spaces for gas exchange.
    • Endodermis (inner): Stores starch (turns black with iodine)

Plant Supporting Tissues (Cont.)

  • Sclerenchyma: Dead lignified cells; Provides strength, rigidity, and hardness

  • Vascular Bundles/Tissues: Found in stems/roots inner part; Composed of two components:

    • Xylem: Conducts water and mineral salts from soil to leaves/stems
    • Phloem: Transports manufactured food from leaves to other parts

Plant Supporting Tissues (Cont.)

  • Cambium: Found between phloem and xylem; produces more xylem and phloem tissues

  • Pith: Central part of dicot stem; Provides rigidity

Dicot vs. Monocot Stems

  • Dicot: Vascular bundles arranged in rings, pith present, wide cortex, fewer vascular bundles, has cambium, distinct endodermis
  • Monocot: Vascular bundles scattered, absence of pith, absence of cambium, many vascular bundles, no endodermis

Dicot vs. Monocot Roots

  • Dicot: Fewer vascular bundles, xylem is star-shaped, pith is absent, cambium is present
  • Monocot: Many vascular bundles, xylem is not star-shaped, pith is present, cambium is absent

Types of Supporting Tissues in Plants

  • Parenchyma, Collenchyma, Sclerenchyma, Xylem, Phloem fibers

Parenchyma

  • Cells become turgid due to water in large vacuoles; Gives support to plants; Rigid cell wall network gives primary support

Collenchyma

  • Thickened cell walls that offer rigidity and support

Sclerenchyma

  • Cell walls thickened with lignin; Provides rigidity and support to the plant

Xylem Structure

  • Long or tabular, lumen present, absence of end walls, dead cells, lignified walls, tracheids present

Xylem Adaptive Features

  • Long tubular structure; no cytoplasm; dead cells (without cytoplasm/nucleus) to transport water and mineral salts; Thick, strong, lignified cell walls to support; Lack of cross walls for effective transport

Xylem Functions

  • Transport water and mineral ions to plant

Phloem Structure

  • Sieve tubes, phloem parenchyma, companion cells, phloem fibers

Phloem Functions

  • Transport manufactured food; Support to plant; Help in food storage

Supporting Tissue Functions

  • Shape, rigidity, flexibility, support, conduction of water/food

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Supporting Tissues in Plants PDF

Description

Test your knowledge on the various supporting tissues found in plants. This quiz covers the structure and functions of essential tissues like collenchyma, parenchyma, and sclerenchyma. Understanding these concepts is crucial for grasping how plants maintain strength and rigidity.

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