Ncert- science – class 7- Chapter 6 – Respiration in Organisms 2 Welcome to your Ncert- science – class 7- Chapter 6 – Respiration in Organisms 2Which of the following parts of a plant do(es) not help in respiration? Leaves Stomata Root hair Xylem None Which of the following processes is enhanced by increased physical activity? Excretion Breathing Inhalation Reproduction None During the process of exhalation, the ribs move down and outwards down and inwards. up and outwards up and inwards. None What are the respective percentages of oxygen and carbon dioxide present in inhaled air? 16.4% and 4.4% 21% and 0.04% 0.041% and 4.4% 21% and 16.4% None The opening of the pharynx to larynx is guarded by Epiglottis Trachea Alveoli Adam’s apple None Where are the respiratory enzymes located? Mitochondrial matrix Peri mitochondrial space Outer membrane Cristae None What happens if the thoracic wall is punctured The breathing rate increases The breathing rate decreases The man dies as the lungs get collapsed The lungs get inflated None Breathing is a process that provides O2 to the body.breaks down food to release energy.helps the body to get rid of CO2.produces water in the cells.Which of the following gives the correct combination of functions of breathing? (ii) and (iv) (i) and (ii) (ii) and (iii) (i) and (iii) None Oxidation of food inside cell takes place in Ribosome Golgi bodies Mitochondria Chromosome None Which of the following aquatic animals has only lungs as a respiratory organ? Fish Dolphin Shark Frog None What is the vital capacity of lungs of an average human? 3000 - 4500 ml 500 - 1000 ml 1500 - 1800 ml 4200 - 5500 ml None The skin of an earthworm is ________ and ________. hard, rough moist, slippery tough, soft spiny, hard None Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process? Lactic acid only Lactic acid and CO2 Alcohol and CO2 Alcohol and lactic acid None Which microorganism plays its role in formation of alcohol? Yeast Algae Viruses Fungi None Yeast is used in wine and beer industries because it respires aerobically producing alcohol. anaerobically producing alcohol aerobically producing oxygen., anaerobically producing CO2. None Earthworms and frogs breathe through their skin because of which the skin of both the organisms is moist and rough. dry and slimy. moist and slimy. dry and rough. None Which of the following are called breathing roots Rhizoids Pneumatophores Lenticels Stomata None Blood is red coloured due to presence of Haemoglobin Leucoplast Chloroplast Plastids None In insects, air enters the body through Skin Spiracles Lungs Gills None Pick the incorrect match. Stomata root hair Air spaces soil Cockroach spiracles Lungs mammals None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
