Biology-B2-Transpiration and Translocation 0.0 / 5 ? BiologyPhotosynthesis and transpirationGCSEAQA Created by: tonisha_Created on: 08-05-22 19:53 What is transpiration? Where does it take place? loss of water from the leaves due to evaporation or diffusion in the xylem 1 of 40 The transpiration stream is what? cohesive 2 of 40 What is cohesive mean? a continuous column of water in a plant 3 of 40 The water molecules inside the? xylem 4 of 40 Are strongly? attracted to each other 5 of 40 This is called? cohesion 6 of 40 The water molecules then ? follow each other 7 of 40 Moving upwards? in the transpiration stream 8 of 40 A potometer demonstrates what? the rate of water uptake 9 of 40 What four factors affect transpiration? wind humidity temperature light 10 of 40 TEMPERATURE ---------------- The higher the temperature,? the higher the rate of transpiration 11 of 40 This is because evaporation? occurs quicker 12 of 40 Due to molecules having? more kinetic energy 13 of 40 WIND/AIR FLOW --------------------- Higher air flow results in what? higher rate of transpiration 14 of 40 This is because more water molecules are? blown away 15 of 40 This also maintains the what? concentration gradient 16 of 40 HUMIDITY ---------------- Higher humidity results in what? a lower rate in transpiration 17 of 40 What is humidity? amount of water vapour in the air 18 of 40 This is because it decreases the? concentration gradient 19 of 40 Because more water molecules ? are outside of the leaf 20 of 40 LIGHT ------------ The higher the light results in what? higher rate of transpiration 21 of 40 This is because more light means there will be a higher rate of? photosynthesis 22 of 40 This means that the _____ is open more? stomata 23 of 40 Therefore more? water can escape 24 of 40 In the day the stomata is what? open 25 of 40 At night it is? closed 26 of 40 This is because when the plant has lots of water, guard cells will become? turgid 27 of 40 This causes them to ____ and ____? swell and open 28 of 40 When the plant is short of water? it will become flaccid and close 29 of 40 Why are more stomata found on the underside of a leaf? since it is shaded and cooler so less water is lost 30 of 40 TRANSLOCATION ------------------ This is the movement of _____ ______ and other _______ around a plant? dissolved sugars and other molecules 31 of 40 What do phloem tubes transport? food such as dissolved sugars 32 of 40 These food substances are for _______ use or _____? immediate use or storage 33 of 40 Phloem tubes are made of ______ ______ cells? elongated living 34 of 40 These contain small ______ which allow ____ ____ to flow through? small pores which allow cell sap 35 of 40 This transport of food goes in what direction? both 36 of 40 This is called? translocation 37 of 40 Xylem tubes are made up of? dead cells 38 of 40 They are strengthened with a material called? lignin 39 of 40 They carry what two substances? water mineral ions 40 of 40
Comments
No comments have yet been made