The diagram below shows the three pathways for water and ion entry into root cells. Identify which correspond to each image (A, B and C) and give the reasons for such identification. vacuole cytoplasm cellular wall desmosomes water transport A vater transport B water transport C
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- (b) Water absorbed by plant roots travels by different pathways from the root hairs to the xylem. Figure 5 shows these pathways in a plant root. cell A xylem vessel root hair key pathway B Tissue D Tissue E * pathway C Figure 5: Schematic representation of water movement through the tissues of a plant root (PLEASE TURN OVER) Page 6 CONT'D from Page 5 i. Explain how water moves from the root hair to the xylem vessels in the root. ii. Identify cellA, pathway B, pathway C, tissue D and tissue E in Figure 5.A root apical meristem is protectedby a thimble-like root cap. Draw andlabel a simple outline of a root dividedinto four sections: root cap (at thebottom), root apical meristem, primarymeristems, and mature tissues.1. Identify the labeled cells, tissues and other associated structures. В A P Q A (region) CI C2 S D T E F V W H X Y J Z K A1 C1 (basic and subtype) L A2 M. N АЗ A4 C2 (term for xylem arms) 2. Discuss which pathway permits the passage of most solutes and water inside the roots? Which pathway allows the entry of most of the water and some of the solutes inside the root tissue? Explain how the Casparian strip creates a barrier for substance moving through this pathway and how it is circumvented. D (tissue composition) E (single layer of cells) L (red cellular coating) H (conducting tissue) G (give rise to lateral roots) O (function) K (conducting cell) J (уре of maturation) M I (conducting cell) (specific cell) F (conducting tissue) N (name of plant specimen )
- Which of the following describes what happens in the ROOT HAIR cells? Mineral lons Water pass into the passes into Plant loses plant the plant water by through through transpiration active osmosis transport A Yes Yes No В Yes Yes Yes C Yes No Yes D No Yes YesExplain why the vascular cambium forms acontinuous sheath that runs from near the tips of thebranches to near the tips of the roots, whereas the corkcambium is discontinuous in both space and time.What is meant by suction force of the plant cell? Does the suction force facilitate or make difficult the entrance of water into the cell?
- Source Sieve tube Punca Tiub tapis Substance V Bahan V Molecule W Molekul W Osmosis Sink Sinki Substance V Bahan V Molecule W Molekul W Figure 2 Rajah 2 Give an example of a plant organ that functions as the source and the sink in the transport above. Berikan contoh organ tumbuhan yang berfungsi sebagai punca dan sinki dalam pengangkutan di atas. Source Punca: Sink Sinki: ...A. Plant Transportation1. Transport of Substances from the epidermis towards the vascular tissuesFill-in the blanks with the following choices: casperian strip, symplast pathway, xylem, plasmodesmata, apoplast pathway Water and solutes either in solution or suspension move through cells through the apoplast and symplast pathway. __________ involves movement of substances through the intercellular spaces (matrix) between cells. __________on the other hand, allows movement of substances by passing through the cell membrane entering the cytosol and transfers to another cell through the opening in the cell walls called __________. However, the presence of the __________in the endodermis before the stele where vascular tissues are found, impedes the apoplastic route, thus substances move via the symplastic route to the__________. 2. Transport of substances through the XylemArrange in sequence the statements. Use 1-5.______ Absorption of water takes place due to capillary action to…Suppose that a scientist exposes a leaf to CO2 labeled with radioactivecarbon-14, which is incorporated into organic compounds inphotosynthetic cells. At various times after exposure, the scientist candetermine the location of the radioactive carbon in the plant. In whattissues would you expect to find the radioactive material immediatelyafter exposure to the labeled carbon? What about during transport?When transport is complete, will the radioactive material be in plantparts above the leaf, below the leaf, or both?
- Name the bind of interaction present between the nodulated roots&rhizobium.Which of the following statements are true for root endodermis?I. Endodermal cells constitute the innermost layer of root cortex and surrond the vascular cylinder (xylem and phloem). II. Endodermal wall is covered with waxy layer of casparian strip which blocks apoplastic transfer of minerals.III. Due to presence of casparian strip, water and minerals can only eneter the vascular cylinder if they will be able to cross the plasma membrane of an endodermal cell.What are ways in which plants accomplish tissue-level transport?a. transmembrane transport of solutes from one cell to anotherb. symplastic transport of materials from one cell to another viaplasmodesmatac. apoplastic transport of water and dissolved solutes through cell wallsand intercellular spacesd. All of the above are used for tissue-level transport.e. None of the above are used for tissue-level transport.