Genius Jnr - If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in. (a) What is W known as? (b) What is (i) X, and (ii) Y? (c) What are organisms Z? (d) State one way of removing layer W from the teeth.

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16 Jul 2020

If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.
(a) What is W known as?
(b) What is (i) X, and (ii) Y?
(c) What are organisms Z?
(d) State one way of removing layer W from the teeth.

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Pump Oxygenated Blood Different Parts Body Pisces Amphibians Following Correct Path Taken Urine Body Kidney Ureter Urethra Bladder B Kidney Bladder Urethra Urete Procedure Cleaning Blood Person Using Kidney Machine Known Ketolysis B Hydrolysis C Dialysis Photoly Substance Reabsorbed Blood Capillaries Surrounding Tubule Nephron Mainly Glucose B Amino Acid C Urea Excretory Unit Human Excretory System Called Nephron B Neuron C Nephridia Kidneyon Instrument Measuring Blood Pressure Called Manometer B Sphygmomanometer C Barometer Potentiometer Blood Vessel Carries Oxygenated Blood Lungs Heart Main Artery B Pulmonary Artery C Main Vein Pulmona Coagulation Blood Cut Wound Brought Plasma B Platelets C Wbc Rbc Following Accomplished Plant Utilising Energy Stored Atp Transport Food B Transport Water Minerals C One Following Valves Heart B Arteries C Capillaries Veins Following Helps Upward Movement Water Dissolved Minerals Roots Leaves Stem Transportation B Transloc Following Conducting Tissue Non Flowering Plants Xylem Vessels B Sieve Tubes C Companion Cells Trach Liquid X Colour Circulates Human Body One Direction Body Tissues Heart Among Things Liquid X Contain Human Body Organ Acts Double Pump Oxygenated Blood Coming Lungs Blood Vessel B Enters Upper Left Cha Liquid Connective Tissue Circulates Body Continuously Without Stopping Tissue Contains Pigment B Imp Water Dissolved Minerals Get Root Hair Plant Process Called Enter Conducting Tissue B Process C Help Transport System Plants Consists Two Kinds Tissues X Tissue X Made Living Cells Consists Two Compone Animal Double Circulation Three Chambered Heart Fish B Snake C Deer Sparrow Autotrophs Water Transported Root Hair B Phloem C Stomata Xylem Wave Expansion Artery Blood Forced Called Flow B Heart Beat C Pulse Ticking Cells Blood Destroy Disease Causing Germs Platelets B Skin Cells C Rbcs Wbcs Excretory Organs Earthworm Nephridia B Nephrons C Raphides Ureters Organs Person Damaged Completely Due Much Poisonous Waste Material B Started Accumulating Blood Maki Pair Bean Shaped Organs P Human Body Towards Back Waist Waste Product Q Formed Decomposition Unused Following Known Energy Currency Cells Biology Dtp B Pdp C Atp Ddt Different Ways Glucose Oxidised Provide Energy Various Organisms Give One Example One Following Organisms Gaseous Exchange Repiration Take Place Cell Membrane Skin Organism Electric Deficiency Oxygen Tissues Human Beings Pyruvic Acid Converted Lactic Acid Cytoplasm B Chloroplast C