Chapter 1 : Respiration

7. Which statement shows the importance ofblood donation? (2009)A Patients suffering from AIDS need bloodtransfusionB There is no substitute for bloodC Recipient can receive blood from all bloodgroupsD Anybody can donate blood at any hospital8. Figure 20 shows the cross section of ahuman heart.11. What are the properties of oxygenated blood?I Rich in oxygenII Rich in waste productsIII Bright red in colourA I and II only BI and III only CII and III only DI, II and III12. Figure 4 shows the cross section of the stemof a plant.Figure 20P and Q are two blood vessels in the heart.Which of the following is true about P and Q?ABCDPPulmonary arterywhich carriesoxygenated bloodPulmonary arterywhich carriesdeoxygenated bloodVena cava whichcarries oxygenatedbloodVena cava whichcarriesdeoxygenated bloodQAorta which carriesdeoxygenated bloodAorta which carriesoxygenated bloodPulmonary veinwhich carriesdeoxygenated bloodPulmonary veinwhich carriesoxygenated blood9. Which of the following is not the function ofblood?A To transport oxygen to the cellsB To transport nutrients to the cellsC To distribute heat throughout the bodyD To transport carbon dioxide to the cells10. A ring of bark was removed from the stem ofa woody plant as shown in Figure 3.Which part transports water and dissolvedminerals?A PC RB QD S13. The cross section of the root of a dicotyledonis shown in Figure 5.What is the function of X?A Transports water and dissolved mineralsB Gives support to the rootsC Transports synthesised food substancesD Excretes food substances14. Transpiration is a process in which plantsA breatheB lose water due to evaporation through therootsC lose water due to evaporation through theleavesD lose water through evaporation due to humidity15. The characteristics of blood component Y isas follows.• Has nucleus• Has no definite shapeWhat causes part X to become swollen aftersome time?A Water has accumulated in part X.B Dissolved minerals have accumulated in part XC Food substances have accumulated in part X.D Part X has become infected.Which of the following is Y?A White blood cellB PlateletC Red blood cellD Plasma