Biology Chapter: Plant Transport Systems
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Questions and Answers

What is the role of xylem in plants?

  • Pulls water from roots
  • Carries food from leaves to other parts
  • Facilitates gas exchange in the leaves
  • Carries water from roots to leaves (correct)

    • What does capillary action refer to?

  • The upward movement of water and minerals from the root to the crown
  • The tendency of a liquid to rise or fall in a tube due to surface tension (correct)
  • The absorption of water by leaves during photosynthesis
  • The process by which nutrients are absorbed by roots

    • Which tissue is primarily responsible for transporting food in plants?

  • Phloem (correct)
  • Cortex
  • Xylem
  • Epidermis

    • What is the main function of capillary action in plants?

    <p>To move water and minerals upwards from the roots</p> Signup and view all the answers

    Which process best describes the ascent of sap?

    <p>Upward movement of water and minerals from the root to the crown</p> Signup and view all the answers

    What process results in root pressure in plants?

    <p>Osmosis of water into the root</p> Signup and view all the answers

    What does the cuticle primarily consist of?

    <p>A multilayered waxy deposit</p> Signup and view all the answers

    How does the thickness of the cuticle affect transpiration?

    <p>Thicker cuticles decrease the amount of water lost</p> Signup and view all the answers

    What is the term for the loss of water from plants in the form of vapor?

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

    What influences the movement of water from the soil into the roots?

    <p>Water potential of the root cells</p> Signup and view all the answers

    What is surface tension primarily concerned with?

    <p>The energy required to increase the surface area of a liquid</p> Signup and view all the answers

    What does osmosis involve?

    <p>The movement of water across a semipermeable membrane</p> Signup and view all the answers

    Which statement correctly describes diffusion?

    <p>It involves the movement of substances from high to low concentration</p> Signup and view all the answers

    What is true about active transport?

    <p>It involves carrier proteins to help substances move</p> Signup and view all the answers

    Which statement is incorrect regarding osmosis?

    <p>It requires energy to transport molecules</p> Signup and view all the answers

    What best defines an active transport mechanism?

    <p>Utilizing energy for transporting substances against a concentration gradient</p> Signup and view all the answers

    What correctly describes the components of conducting tissue?

    <p>It is a group of cells that performs specialized functions</p> Signup and view all the answers

    Which of the following is true about diffusion and osmosis?

    <p>Both involve the movement of molecules across a membrane</p> Signup and view all the answers

    What occurs to the rate of transpiration when humidity is high?

    <p>It decreases significantly.</p> Signup and view all the answers

    What phenomenon is described as the excess water loss from a plant during low atmospheric vapor pressure?

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

    How does wind speed affect the rate of transpiration?

    <p>It increases the rate.</p> Signup and view all the answers

    What role do hydathodes play during periods of high transpiration?

    <p>They expel excess water in liquid form.</p> Signup and view all the answers

    What is indicated by low moisture in the atmosphere in relation to transpiration?

    <p>Transpiration is reduced.</p> Signup and view all the answers

    What effect does the presence of intercellular spaces in a leaf have on transpiration?

    <p>It allows for gas exchange and influences transpiration.</p> Signup and view all the answers

    Which condition would most likely lead to a maximal loss of water through transpiration?

    <p>Low humidity and high wind speed.</p> Signup and view all the answers

    In terms of water movement through a plant, what is the primary function of the xylem during transpiration?

    <p>Facilitating water movement to leaves for evapotranspiration.</p> Signup and view all the answers

    What are sieve plates specialized structures known for?

    <p>Storing food</p> Signup and view all the answers

    Which cells assist sieve tubes in their function?

    <p>Companion cells</p> Signup and view all the answers

    In which parts of the plant can food be stored?

    <p>Roots, stems, or fruits</p> Signup and view all the answers

    What role do companion cells have in relation to sieve tube elements?

    <p>They assist in nutrient loading</p> Signup and view all the answers

    What is the main process involved in the loss of water from plants?

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

    During which time of day is the water loss in plants typically highest?

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

    In relation to water loss, what information does the connection between source and companion cells provide?

    <p>Transpiration rates vary per species</p> Signup and view all the answers

    From which part of the plant was the maximum water loss observed in the data?

    <p>Leaves of plant A</p> Signup and view all the answers

    Study Notes

    Teaching Liquid in a Capillary Tube

    • Hydrogen bonding can be explained in a capillary tube
    • Capillary action: the tendency of a liquid to rise or fall as a result of surface tension

    Tissue

    • Group of cells

    Xylem

    • Carries water from roots to leaves
    • Upward movement of water & minerals from the roots to the crown of the plant

    Phloem

    • Carries food from leaves to other parts of the plant

    Capillary Action

    • Movement of a liquid in a narrow tube or absorbent material

    Ascent of Sap

    • Ascent of sap is the upward movement of water and minerals from the roots to the crown of the plant

    Root Pressure

    • Water potential of a root cell is less than that of the outside soil.
    • This causes the movement of water into the root through osmosis.
    • Root pressure pushes water up the xylem.

    Cuticular Transpiration

    • Cuticle is a waxy layer that covers the leaves of plants.
    • While impermeable to water, a certain amount of water can pass through it.
    • The amount of water lost depends on the thickness of the cuticle.

    Transpiration

    • Loss of water from the plant in the form of water vapor.
    • The amount of water lost depends on the thickness of the cuticle
    • Surface Tension can be explained to students: The energy of work required to increase the surface area of a liquid due to intermolecular forces.

    Diffusion

    • Movement of molecules from a region of higher concentration to a region of lower concentration.

    Osmosis

    • Movement of water across a semipermeable membrane from a region of higher water potential to a region of lower water potential.

    Active Transport

    • Transport of substances across the cell membrane against the concentration gradient.
    • Requires input of energy and does not take place impulsively.

    Conducting Tissue

    • A tissue is a group of cells that perform a specialized function in organisms.
    • Conducting tissue transports substances.

    Guttation

    • Water is forced out of the plant body through special vein openings called hydathodes.
    • This happens when the humidity is high and the pressure in the xylem is high.
    • Guttation is the excess water that is collected in droplets on the leaves of plants.

    Food Storage

    • Food can be stored in roots, stems, or fruits.

    Sieve Tubes

    • Sieve tubes are part of the phloem and help transport food.
    • They have partitions called sieve plates.
    • Companion cells assist the sieve tubes in functioning properly.

    Transpiration Rate

    • Water loss is measured in ml/hr
    • The transpiration rate depends on the time of day, temperature, humidity, and wind speed.
    • Increase in humidity decreases transpiration rate.
    • Increase in wind speed increases transpiration rate.

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    Related Documents

    Transport of Food and Minerals in Plants PDF

    Description

    Explore the fascinating mechanisms of how plants transport water and nutrients through various structures such as xylem and phloem. This quiz dives into concepts such as capillary action, root pressure, and the ascent of sap to test your understanding of plant biology.

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