The aim of this pack is simple — we wanted to condense the A-level Biology course into a few super condensed pages. The sites linked to here are not maintained by me, although I have checked them for … Translocation Translocation is the movement of organic molecules. Tes Paid Licence. TRANSPORT IN PLANTS 1- Parenchyma - living cells - round in shape - thin cell walls - large vacuole - functional cell e.g; Chlorenchyma cell--> mesophyll cells - large intercellular spaces 2- Collenchyma - living cells Learn vocabulary, terms, and more with flashcards, games, and other study tools. Translocation is the movement of organic molecules. Finally, the xerophytes tend to have a thicker waxy cuticle to prevent water loss and extensive root networks to reach any available water. Follows the New OCR A Level Biology [A] Specification, could be adapted to other exam boards Lessons follow the Oxford A Level Biology for OCR Textbook . OCR - A-Level - Biology - Transport in Plants Flowchart by Josh Anderson, updated more than 1 year ago More Less Created by Josh Anderson almost 3 years ago 38 1 0 Description. It is possible for the water to move in one direction, which is typically against gravity, due to water transpiring from the leaves and creating a pulling force on the water left in the plant. We provide detailed revision materials for A-Level Biology students and teachers. The handwritten posters cover the content required for the whole chapter (same chapters as those in the 2015 Pearson textbook) to the best of my knowledge (plus occasional extra details). SER – create, store and transport lipids and carbohydrates. This volume is divided by the time it took to lose that volume of water to get a rate. CIE A level biology notes Monday, 22 February 2016. ... NEW OCR A Level Biology - Transport in Plants. One cell type are the sieve tube elements, which are long and thin arranged as a column. It is not an exact measure, as it actually measures the rate of water uptake by a cut shoot. active transport and maintaining turgidity in plant cells. This is because the cell sap has organic and inorganic molecules dissolved in it. If the surrounding air is less humid or there is a lot of wind to carry away evaporated water molecules, then transpiration will occur faster due to a greater concentration gradient. They are hollow because they are dead cells that do not contain any organelles and they have no end walls, to enable a column to from. Plants are able to control water loss, as stomatal opening is controlled by cells called guard cells. swiggin74 ... OCR A level Biology (H020 -from 2015) 2.1.2 Carbohydrates 1 - sugars Water is first absorbed by osmosis via the root hair cells, adapted to maximise osmosis by having thin walls and a large surface area. Flashcards. marram grass, cacti etc. Over 22,000 learners have used our materials to pass their exams. 4.9 70 customer reviews. Plant Transport And Phytotomy 3. Phloem tissue is made up of different cells. Minerals are also absorbed but, as you should be able to work out, their absorption requires energy in the form of ATP be… Blood and Tissue Fluid AS Biology. Transpiration is the evaporation of water through the stomata, typically on leaves. Biology 10: Transport in multicellular plants interactive flashcards (Cram.com) This site (and associated app to download to smartphones) specialises in generating flashcards for revision. OCR AS/A Level Biology A Flashcards Decks in this Class (14): Module 31 Exchange Surfaces And Breathin. Created: Mar 30, 2016 | Updated: Feb 22, 2018. Two main types of plant tissue are used in transport - xylem and phloem. OCR AS/A Level Biology B (Advancing Biology) Water and its importance in plants and animals (2.1.2) ... and as the essential transport medium in plants and animals: To include the transpiration stream, cell sap and the maintenance of turgor in plants, and plasma, serum, tissue fluid, … NEW OCR A Level Biology - Transport in Plants. The movement of water through a plants xylem is largely due to the evaporation of water vapour from the leaves and the cohesive and adhesive properties exhibited by water molecules; It is the gradient in water potential that is the driving force permitting the movement of water from the soil (high water potential), to the atmosphere (low water potential), via the plant’s cells Biology; Biology / Plants; 16+ View more. Multicellular plants have a small surface area: volume ratio so diffusion would be too slow to provide necessary substances like water, minerals and sugars and to remove waste substances. Transport in Animals (a) explain the need for transport systems in multicellular animals in terms of size, level of activity and surface area: volume ratio (b) explain the meaning of the terms: (c) explain the meaning of the terms: d) describe, with the aid of diagrams and photographs, the external and internal structure of the […] The name sieve is used to describe the fact that the end walls are perforated, like a sieve. FREE (70) HenrikHanson NEW OCR A Level Biology - Communicable Diseases. Water evaporating out of open stomata, transpiration. This movement of water out of the stomata results in the water column being pulled up the xylem towards the stomata, this is known as the transpiration pull. Best CBD Oil for Anxiety There is a thin boundary layer between adjacent cells called the middle lamella. A Level Biology Revision for AQA, OCR or Edexcel. A-Level Biology does pretty much what it says on the tin. OCR Linear Biology > > > > > Exam Archive 08-16 Careers Chapter 9 - Transport in Plants A-Level Science Articles. Other resources by this author. Read more. Perfect revision resources for OCR A Level Biology. Check out Adapt — the A-level & GCSE revision timetable app. Transpiration is the evaporation of water from a plant’s surface, especially the leaves. The cut leafy plant is then attached to the potometer, using rubber seals and petroleum jelly to make the equipment air tight. zincmanganese. Once the sucrose is transported into the sieve tube cells, they will only move on mass if there are changes in pressure. Water moves up the xylem for the following reasons. Question Answer. Practical skills assessed in a written examination; Practical skills assessed in the practical endorsement Transport in Plants. In Exam questions , questions by topic Tags OCR Biology , Exam question It is essential because photosynthesis only occurs in leaves, so this sugar that has been produced needs to be transported to all the cells in the plant to use for respiration. Water lost by the leaf is replaced from the water in the capillary tube. Transport in Plants Plants need a transport system to: Move water and minerals from the roots up to the leaves Move sugars from the leaves to the rest of the plant The Vascular Tissues Water and soluble mineral ions travel upwards in the xylem tissue Assimilates such as … Test. OCR A LEVEL BIOLOGY - UNIT 2.1 (PART 2) ... GCSE Biology - Transport in plants - Translocation (Phloem) and Transpiration (Xylem) #25 - Duration: 5:00. We provide detailed revision materials for A-Level Biology students and teachers. sugars – sucrose) through the phloem tissue and is an energy-requiring process. OCR Biology AS- Chapter 9 - transport in plants study guide by HollyMaher2000 includes 16 questions covering vocabulary, terms and more. Students must complete all components (01, 02, 03, and 04) to be awarded the OCR A Level in Biology A. Phloem tissue is made up of different cells. MissHanson STUDY. Free. (m) describe, with the aid of diagrams, the mechanism of transport in phloem involving active loading at the source and removal at the sink, and evidence for and against this mechanism. OCR AS and A Level Biology (from 2015) qualification information including specification, exam materials, teaching resources, learning resources Home > A Level and IB study tools > Biology > OCR AS Biology - F211 - Transport in Plants OCR AS Biology - F211 - Transport in Plants A general quiz on the transport in plants section of Unit 1 Module 2 OCR Biology The following articles will help to explain and deepen your understanding and knowledge of topics linked to this ... Chapter 9 - Transport in Plants A-Level Science Articles. BIOLOGY B (ADVANCING BIOLOGY) AS and A LEVEL Delivery Guide H022/H422 Theme: Transport Systems in Plants 2.2.4 June 2015 The sucrose molecules will also bind to the co-transport molecules and be moved in the sieve tube element cell. OCR (A) A-Level Biology Revision For each of the papers below, there are revision notes, summary sheets, questions from past exam papers separated by topic and other worksheets. Communicable Diseases, Disease Prevention and the Immune System, Practical Skills Assessed in the Practical Endorsement, Practical Skills Assessed in a Written Examination, Cell Division, Cell Diversity and Cellular Organisation, Development of Practical Skills in Biology. a level biology student. How are assimilates loaded into the phloem? Next to these cells are companion cells. leaves) and sinks (e.g. FREE (55) Popular paid resources. This apparatus can be reset and different conditions applied to the leaf to see if the rate changes. M0.1, M0.3, M0.4, M1.1, M2.1, M4.1 HSW1, HSW3, HSW5, HSW8 (b) (i) the structure and function of the The sucrose is transported by facilitated diffusion into the companion cells, down a concentration gradient. OCR AS/A Level Biology B (Advancing Biology) Gas exchange in mammals and plants (2.2.3) Module 2: Cells, chemicals for life, transport and gas exchange The Heart & Circulatory System. Xerophytes are plants with adaptations to reduce water loss, and are therefore found in locations with limited water, for example the desert. Phloem transports organic molecules such as the products of photosynthesis. OCR A level Biology - Module 3 - Plant transport - series of 7 lessons. This cohesion results in water forming a continuous column in the plant stem. Mass Transport in Plants AS Biology Questions AQA OCR Edexcel Author: Maths Made Easy Subject: A Level Biology Keywords: biology, questions, worksheets, revision, aqa, edexcel, ocr, a level, Mass Transport, plants, questions Created Date: 9/28/2017 3:18:36 PM AS Papers 1 & 2 Mass Transport in Plants AS Biology Answers AQA OCR Edexcel Author: Maths Made Easy Subject: A Level Biology Keywords: biology, questions, worksheets, revision, aqa, edexcel, ocr, a level, Mass Transport, plant Created Date: 9/28/2017 3:17:55 PM OCR (A) A-Level Biology We have worked hard to compile every past paper by topic and exam board! 8. £9.00. The potometer is filled with water and all air bubbles are removed. The root hairs provide a large surface area over which water can be absorbed. Quizlet flashcards, activities and games help you improve your grades. All modules and topics have the identical name to the spec and are in the exact same order. Size, metabolic rate, surface area to volume ratio. Menu  OCR A Level Biology Revision. Mass Transport in Plants AS Biology Questions AQA OCR Edexcel Author: Maths Made Easy Subject: A Level Biology Keywords: biology, questions, worksheets, revision, aqa, edexcel, ocr, a level, Mass Transport, plants, questions Created Date: 9/28/2017 3:18:36 PM Unit of work, including PowerPoint lesson plans and student notes to print, as well … Thigmotropism - shoots of climbing plants; c) explain how plant responses to environmental changes are co-ordinated by hormones, with reference to responding to changes in light direction; Auxins stimulate growth by causing cell elongation. The link here is for basic questions and answers about the need for transport in multicellular plants. A level Biology (To Be Printed) Flowchart on OCR - A-Level - Biology - Transport in Plants, created by … A-Level Biology does pretty much what it says on the tin. It is a side effect of gas exchange as a plant needs to open its stomata to let in carbon dioxide so that it can produce glucose by photosynthesis, but it also lets water out as there’s a higher concentration of water inside the leaf than in the air outside water moves out of the leaf down the water potential gradient when the stomata is open. Organic molecules, such as sucrose, are created in the leaves by photosynthesis. Why size affects a plant's need for a transport system. roots, meristems). Plant Cells and water, water uptake and movement up the stem, Transpiration. Start studying OCR Biology A-level Transport in plants. • Water moves up the xylem by capillarity which is the upward movement of a fluid in a narrow bore tube – xylem has very narrow vessels. Characteristics and Classification of Living Organisms, 20. About Us | Contact Us | Privacy Policy | Terms and Conditions | Sitemap, GCSE, IGCSE, A-Level, and IB Biology Resources & Revision for all exam boards, Unit 2: Body Systems, Genetics, Microorganisms and Health, Unit 1: Cells, Living Processes and Biodiversity, Biology 1: Adaptation, Evolution and Body Maintenance, Biology 2: Cells and Metabolism, Digestion and Respiration, Biodiversity, 1. Phytotomy Root System - Roots Shoot System - Node – Wear plants grow outward - Internodes - Leaves 4. So if you’re revising Cell Division for OCR (A) A-Level Biology, you can find all of the Cell Division questions that have been ever asked by OCR in one single document - useful, no? A potometer measures the rate of transpiration and can therefore be used to investigate the effect of a named environmental variable on the rate of transpiration. Learn vocabulary, terms, and more with flashcards, games, and other study tools. It moves from source to sink. Write. OCR - A-Level - Biology - Transport in Plants Flowchart by Josh Anderson, updated more than 1 year ago More Less Created by Josh Anderson almost 3 years ago 38 1 0 Description. Over 22,000 learners have used our materials to pass their exams. A xerophyte is a plant that is adapted to reduce water loss so that it can survive in very dry conditions e.g. Guard cells swell and bend when the plant has a lot of water, resulting in the stomata opening. FREE (70) HenrikHanson NEW OCR A Level Biology - Communicable Diseases. Module 3: Exchange and transport. ... AS Biology - Mass Transport. Notes for the CIE IGCSE Biology topic: 8. Over 22,000 learners have used our materials to pass their exams. Multicellular plants have a small surface area: volume ratio so diffusion would be too slow to provide necessary substances like water, minerals and sugars and to remove waste substances. The following articles will help to explain and deepen your understanding and knowledge of topics linked to this module. Perfect revision resources for OCR A Level Biology. The micrograph below shows the adaptations more visibly. One cell type are the sieve tube elements, which are long and thin arranged as a column. As a result, water will move from the xylem into the phloem by osmosis. Water absorbed via root hair cells by osmosis, Water moving up the xylem as a continuous water column due to cohesion (cohesion-tension theory). ... Chapter 9 - Transport in Plants A-Level Science Articles. Cognito 37,332 views. A potometer is used to estimate the rate of water loss. Preview. These have been made according to the specification and cover all the relevant topics in the syllabus for examination in May/June as well as October/November and March. Xylem There are four types of xylem cells: Xylem vessels: Consist of dead hollow cells because the walls are lignified and the cell contents disintegrate. Xylem transports water and minerals. BioKnowledgy Presentation on 9.1 Transport in the xylem of plants (AHL) from Chris Paine Please like and share (and click on a advert to help with the hosting costs !) A-LEVEL OCR BIOLOGY CHEATSHEET PACK. Learn. This course contains highly interesting and qualified coverage of all topics. Created by. Transport in Plants Revision Notes. Once this water reaches the xylem it is transports through the xylem hollow, thick-walled tubes to the rest on the plant. Start studying A level Biology OCR A - Transport in plants. Transport in Plants (a) explain the need for transport systems in multicellular plants in terms of size and surface area: volume ratio. Spell. Powered by Create your own unique website with customizable templates. A level Biology (To Be Printed) Flowchart on OCR - A-Level - Biology - Transport in Plants… BIOLOGY AS LEVEL REVISION 02 2. OCR A Level Biology past paper exam questions organised by topic with model answers. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Author: Created by HenrikHanson. Start studying OCR AS Level Biology: Transport in Plants. The movement of the sucrose into the sieve tube elements will create a move negative water potential, whereas the xylem directly next to the phloem will have a far more positive water potential. How can I re-use this? So if you’re revising Cell Division for OCR (A) A-Level Biology, you can find all of the Cell Division questions that have been ever asked by OCR in one single document - useful, no? Also multicellular plants are large so have a greater demand for substances. OCR 22 AS and A Level Biology A Delivery Guide 3.1.3 Transport in plants (a) the need for transport systems in multicellular plants To include an appreciation of size, metabolic rate and surface area to volume ratio (SA:V). Stomata open more when it is light and the plant cells are turgid. OCR AS Level Biology: Transport in Plants. All. Trapping humid air reduces the water potential gradient, which is why transpiration is reduced. To convert this into an estimate of transpiration rate the distance the bubble moved can be used to work out the volume of water in the tube that evaporated. Phloem is the tube responsible for the transport of organic substances in plants, such as sugars. OCR AS/A Level Biology A; Module 3: Exchange and ... Genetics, evolution and ecosystems; Share. Due to the dipolar nature of water, it forms hydrogen bonds between water molecules creating cohesion. Transport in plants multiple choice This site is intended as an educational resource. Question Answer. Much of the strength of a plant comes from cells toughened by lignin. Terms in this set (91) Reasons why plants need transport system. This change in diameter of the xylem is measurable, for example the diameter of tree trunks will change according to transpiration rates. (b)describe, with the aid of diagrams and photographs, the distribution of xylem and phloem tissue in roots, stems and leaves of dicotyledonous plants, (c) describe, with the aid of diagrams and photographs, the structure and function of  xylem vessels, sieve tube elements and companion cells. Get Started. OCR AS/A Level Biology B (Advancing Biology) Transport systems in plants (2.2.4) ... Few students will have studied plant transport systems in depth and delivery of lessons can begin with a review of what students already know and understand. PLAY. Tension, or a pulling force, is created when the water evaporates out of the stomata. Fairly simple (I assume) but I do need help with it.. (l) explain translocation as an energy-requiring process transporting assimilates especially sucrose, between sources (e.g. OCR A Level Biology past paper exam questions organised by topic with model answers. (h) explain, in terms of water potential, the movement of water between plant cells, and between plant cells and their environment, (i) describe, with the aid of diagrams, the pathway by which water is transported from the root cortex to the air surrounding the leaves, with reference to the Casparian strip, apoplast pathway, symplast pathway, xylem and stomata, (j) explain the mechanism by which water is transported from the root cortex to the air surrounding the leaves, with reference to adhesion, cohesion and the transpiration stream, (k) describe with the aid of diagrams and photographs, how the leaves of some xerophytes are adapted to reduce water loss by transpiration. The name sieve is used to describe the fact that the end walls are perforated, like a sieve. Module 3.1 Exchange Surfaces and Breathing ... Module 33 Transport In Plants. Water enters through the root hair cells and then moves across into the xylem tissue in the centre of the root. A Level Biology Revision for AQA, OCR or Edexcel. I… Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... mission. Content is in six modules, each divided into key topics: Module 1: Development of practical skills in biology. They increase the strictness of the cell wall by promoting active transport of H+ ions by ATPase The root hairs provide a large surface area: volume ratio, sugars being... Materials for A-Level Biology we have worked hard to compile every past paper questions! Firstly, the leaves are rolled and this helps trap any transpired water vapour to a! Change according to transpiration rates gaseous Exchange up, and more series of 7.! Why size affects a plant comes from cells toughened by lignin water based solutions ) a ) explain transpiration. Has higher water potential, than the solution inside the root more when it is through! Consequence of gaseous Exchange put tension on the tin it actually measures rate... Air reduces the water and all air bubbles are removed at the end of water and... Hair like structures and the plant stem exam questions organised by topic exam... Transpiration rates water and all air bubbles are removed dipolar nature of water based )! Tags OCR Biology, exam question CIE a Level Biology past papers, worksheets and revision materials A-Level! Vapour to create a concentration gradient, which is why transpiration is the tube for!... Chapter 9 - transport in multicellular plants are able to reach all the cells OCR a Biology! Open more when it is not an exact measure, as it actually measures the rate of loss! Questions by topic Tags OCR Biology, exam question CIE a Level Biology: transport plants... ( e.g explain the need for transport in multicellular plants in terms of and! Pull will draw up the stem, transpiration this increase in volume will create high! Includes 16 questions covering vocabulary, terms, and more with flashcards, games, more. The potometer is used to describe the fact that the end walls are perforated, like sieve... Can also diffuse in for photosynthesis prevent further transpiration can survive in very dry conditions.. And teachers environment and prevent further transpiration molecules will also bind to the properties of water solutions. Water column as they are hollow cells 1: Development of practical skills in Biology of water 3.1... This apparatus can be shown by cutting off a shoot near soil Level an process. Multicellular plants are large so have a greater demand for substances is why transpiration the! Will constantly be transported in to them to ocr a level biology transport in plants respiration rates from companion! Air tight the spec and are therefore Found in plants is not an exact measure ocr a level biology transport in plants. Affects a plant 's need for transport in multicellular plants in terms of size and area. Phloem transports organic molecules, such as the products of photosynthesis content is in six,! Cells and water, for example the diameter of tree trunks will change according to transpiration rates water to..., attaching to the co-transport carrier protein skills in Biology the equipment and the stomata opening ( the of! A humid environment and prevent further transpiration a consequence of gaseous Exchange, 2016 | Updated: Feb,. Transpiration rates a large surface area over which water can be shown by cutting a... Exam board to here are not maintained by me, although I have checked for! Link here is for ocr a level biology transport in plants questions and answers about the need for a transport system down a concentration.. To describe the fact that the end walls are perforated, like a sieve exposed xylem transporting assimilates especially,! Terms of size and surface area to volume ratio reduce water loss extensive. Secondly, there is a co-transport protein involving hydrogen ions must first be transported... Internodes - leaves 4 paper by topic and exam board knowledge of topics linked this! Molecules creating cohesion divided by the leaf is replaced from the xylem links to the dipolar nature water. Root hair cells and then moves across into the sieve tube elements a... Papers 1 & 2 a Level Biology notes Monday, 22 February.... Course contains highly interesting and qualified coverage of all topics we provide revision... Thin arranged as a column ’ s surface, especially the leaves are rolled and this trap! Wall: Found in plants, algae and fungi moved in the phloem by osmosis into respiring. Hollow cells osmosis into these respiring cells, down a concentration gradient, which are long thin. Cell wall: Found in plants and modules for all specifications including H020, H420, H021, H421 root. To prevent water loss and extensive root networks to reach any available water air is... Water has higher water potential of respiring cells, they will only move on mass if there are in. Games help you improve your grades a pulling force, is created when the water of... Companion cells into the equipment and the distance that this air bubble has towards! To get a rate pretty much what it says on the plant cells turgid... Hollymaher2000 includes 16 questions covering vocabulary, terms and more your studies A-Level Science articles understanding and knowledge topics. By photosynthesis of gaseous Exchange notes Monday, 22 February 2016 pretty much what it says on xylem! Size and surface area: volume ratio if there are no air bubbles inside the root hair cells - ). To make sure there are changes in pressure to pass their exams between adjacent called! To trap humid air reduces the water in the centre ocr a level biology transport in plants the strength of a plant from... To reduce water loss xylem cells are turgid dissolved in the leaves leaves are rolled and helps. Process transporting assimilates especially sucrose, between sources ( e.g cells, decreasing the hydrostatic pressure pressure. Phloem sugar solutions will move by osmosis and from individual cells quickly to see the. Transport - series of 7 lessons, down a concentration gradient capillary tube is called translocation is. Need help with it equipment and the distance that this air bubble is then attached to potometer..., again to trap humid air Module 3.1 Exchange Surfaces and Breathing... Module transport. Evaporates out of the xylem into the sieve tube elements down a concentration gradient bonds between water creating. Questions covering vocabulary, terms and more with flashcards, activities and games help improve... Products of photosynthesis this change in diameter of the xylem is measurable for... Different conditions applied to the rest on the tin potometer, using rubber seals and petroleum jelly to the. Games help you improve your grades comes from cells toughened by lignin for systems. Activities and games help you improve your grades transport - series of 7 lessons tree trunks will change to. Condensed pages as sucrose, are created in the capillary tube - leaves 4 water can shown. Sunken in pits, again to trap humid air best CBD Oil for Anxiety can! Transport into the companion cells into the companion cells, they will only move on mass there... Here are not maintained by me, although I have checked them for … a Level Biology - 3.3... Around the plant stem ions can then transport into the xylem it is light and the stomata.. And extensive root networks to reach any available water a column UNIT groups shown below created large! Xylem cells are turgid a humid environment and prevent further transpiration why transpiration is the evaporation water! And bend when the water evaporates out of the root hairs provide large. Plants grow outward - Internodes - leaves 4 a large surface area over which can. Cell sap has organic and inorganic molecules dissolved in the sieve tube element cell a sieve the most lecture... Study tools, surface area: volume ratio sucrose ) through the root hairs provide a large surface over... Provide detailed revision materials for A-Level Biology students and teachers for … a Level Biology - 7 ) plant 1... Rolled and this helps trap any transpired water vapour to create a humid environment and prevent transpiration... Centre of the stomata Made Easy, the xerophytes tend to have a greater demand for substances control water...., store and transport lipids and carbohydrates potometer is used to describe the fact that the end water! The link here is for basic questions and answers about the need for transport systems in multicellular plants able. And thin arranged as a result, water will evaporate out, carbon dioxide can also diffuse in for.! And fungi water from a plant that is adapted to form this continuous column! Soil water has higher water potential gradient, which are long and thin arranged a... Revision materials for A-Level Biology students and teachers the link here is for questions... Materials for A-Level Biology we have worked hard to compile every past paper by topic and exam!. Sugar solutions will move by osmosis column can be measured A-Level Biology does pretty much what it on! S surface, especially the leaves by photosynthesis exact measure, as it actually the! Root networks to reach all the topics and modules for all specifications including H020, H420,,! - Node – Wear plants grow outward - Internodes - leaves 4 when the plant cells then... Force to water in the sieve tube elements for mass transport around the plant stem evaporate,! Them for … a Level Biology past papers, worksheets and revision materials for A-Level Biology we worked. Layer between adjacent cells called guard cells therefore sucrose will constantly be transported in to them maintain. Games help you improve your grades into a few super condensed pages of a plant that is to! Are created in the xylem for the CIE IGCSE Biology topic: 8 up... The mass flow hypothesis ) HenrikHanson NEW OCR a Level Biology - in... Using rubber seals and petroleum jelly to make the equipment air tight but I do need with...