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? Root hair Xylem Leaves Stomata None In insects, air enters the body through Gills Skin Spiracles Lungs None During the process of exhalation, the ribs move down and outwards up and outwards up and inwards. down and inwards. None Which microorganism plays its role in formation of alcohol? Yeast Fungi Algae Viruses None The skin of an earthworm is ________ and ________. hard, rough spiny, hard tough, soft moist, slippery None Which of the following are called breathing roots Rhizoids Lenticels Stomata Pneumatophores None Which of the following processes is enhanced by increased physical activity? Excretion Inhalation Breathing Reproduction None What happens if the thoracic wall is punctured The breathing rate decreases The breathing rate increases The lungs get inflated The man dies as the lungs get collapsed None Which of the following aquatic animals has only lungs as a respiratory organ? Dolphin Fish Shark Frog None Pick the incorrect match. Lungs mammals Stomata root hair Cockroach spiracles Air spaces soil None Blood is red coloured due to presence of Plastids Haemoglobin Leucoplast Chloroplast 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? (i) and (ii) (ii) and (iii) (ii) and (iv) (i) and (iii) None Yeast is used in wine and beer industries because it respires anaerobically producing alcohol aerobically producing oxygen., aerobically producing alcohol. anaerobically producing CO2. None Oxidation of food inside cell takes place in Mitochondria Chromosome Ribosome Golgi bodies None Earthworms and frogs breathe through their skin because of which the skin of both the organisms is moist and rough. dry and rough. dry and slimy. moist and slimy. None What is the vital capacity of lungs of an average human? 4200 - 5500 ml 500 - 1000 ml 3000 - 4500 ml 1500 - 1800 ml None The opening of the pharynx to larynx is guarded by Trachea Adam’s apple Alveoli Epiglottis None Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process? Alcohol and CO2 Lactic acid and CO2 Lactic acid only Alcohol and lactic acid None Where are the respiratory enzymes located? Mitochondrial matrix Cristae Peri mitochondrial space Outer membrane None What are the respective percentages of oxygen and carbon dioxide present in inhaled air? 21% and 16.4% 0.041% and 4.4% 16.4% and 4.4% 21% and 0.04% 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.
