Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hi please can I have help with this...

    Describe one piece of evidence that supports the root pressure theory and explain how it supports this theory.
    •  Official Rep
    Offline

    15
    ReputationRep:
     Official Rep
    Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

    You can also find the Exam Thread list for A-levels here and GCSE here. :dumbells:


    Just quoting in Puddles the Monkey so she can move the thread if needed
    Spoiler:
    Show
    (Original post by Puddles the Monkey)
    x
    Offline

    9
    ReputationRep:
    (Original post by anniebrads)
    Hi please can I have help with this...

    Describe one piece of evidence that supports the root pressure theory and explain how it supports this theory.
    Introductory question: what is root pressure theory?
    Spoiler:
    Show
    - Endodermal cells move ions into the xylem, thereby decreasing water potential- Decreased water potential leads to increased water flow into xylem- Results in higher hydrostatic pressure, with the ability to move water up through the stem/trunk of the plant

    From there, how what are some ways to test it? Do you know of any similar situations where you can test whether a system is under pressure? How about a garden hose that is hidden at both ends?
    Spoiler:
    Show
    - Poke a hole in the middle and see if sap oozes out
    - Garden hose with a hidden nozzle. If you apply pressure at one end of the hose, water will move from one end to another. If no pressure is applied, water won't move inside. So you poke a hole in it. If water is pressurised/moving, it will spray out of the hole (path of least resistance). If water isn't pressurised/moving, nothing happens.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.