1. Leaving Certificate Biology Transport & Gas Exchange in Plants 1 iQuiz SECOND Press the F5 Key to Begin, Then click on this Blue Box FIRST In PowerPoint 2007 if you see a Security Warning click HERE on Options… and then click on  Enable this content

2. Stomata are found mainly in the … StemPetals Upper leaf surfaceLower leaf surface

3. Root hairs are extensions of the … EpidermisGround tissue CuticleXylem

4. Water enters the root hair by … DiffusionOsmosis Active transportCapillary action

5. The sticking together of similar molecules is called … Conservation AdhesionActive transport Cohesion

6. Stomata are stimulated to open by … High water pressure Low O 2 High CO 2 Low CO 2

7. The main gas which enters the leaf through the stomata during the day is … Water vapourOxygen Carbon dioxideNitrogen

8. The loss of water vapour from the surface of the leaf is called … Transpiration stream Transpiration TranslocationEvaporation

9. Gas exchange takes place in the stem through the … LenticelsStomata InternodesPores

10. When plant cells have a lot of water they are said to be … TensionedTurgid WiltedFlaccid

11. Minerals are transported through a plant in the … Phloem sieve tubes Companion cells XylemGround tissue

12. Carbon dioxide enters the leaf by … TranspirationActive transport OsmosisDiffusion

13. Sugars made in photosynthesis are transported through the plant in the … Companion cellsXylem vessels Sieve tube cellsGround tissue

14. Dixon and Joly suggested that water in the xylem is under … TorsionTension TransportTranspiration

15. Water moves sideways from one xylem vessel to another through … Sieve platesPits Spiral ligninCompanion cells

16. Which of the following does not involve the upward movement of water in the stem? Root pressureCohesion OsmosisTranslocation

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