Ncert- science – class 7- Chapter 6 – Respiration in Organisms 2 Welcome to your Ncert- science – class 7- Chapter 6 – Respiration in Organisms 2What are the respective percentages of oxygen and carbon dioxide present in inhaled air? 0.041% and 4.4% 16.4% and 4.4% 21% and 0.04% 21% and 16.4% None Yeast is used in wine and beer industries because it respires anaerobically producing alcohol aerobically producing alcohol. aerobically producing oxygen., anaerobically producing CO2. None Which microorganism plays its role in formation of alcohol? Algae Fungi Viruses Yeast None In insects, air enters the body through Spiracles Skin Lungs Gills None Pick the incorrect match. Lungs mammals Stomata root hair Cockroach spiracles Air spaces soil 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 During the process of exhalation, the ribs move down and outwards up and inwards. up and outwards down and inwards. 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 only Lactic acid and CO2 Alcohol and lactic acid None Earthworms and frogs breathe through their skin because of which the skin of both the organisms is dry and rough. moist and slimy. moist and rough. dry and slimy. None Which of the following processes is enhanced by increased physical activity? Breathing Reproduction Inhalation Excretion None Blood is red coloured due to presence of Haemoglobin Leucoplast Chloroplast Plastids None Which of the following aquatic animals has only lungs as a respiratory organ? Fish Shark Frog Dolphin None The opening of the pharynx to larynx is guarded by Trachea Alveoli Adam’s apple Epiglottis None Oxidation of food inside cell takes place in Chromosome Mitochondria Ribosome Golgi bodies None Which of the following are called breathing roots Pneumatophores Lenticels Rhizoids Stomata None Where are the respiratory enzymes located? Peri mitochondrial space Outer membrane Mitochondrial matrix Cristae None Which of the following parts of a plant do(es) not help in respiration? Xylem Stomata Root hair Leaves None The skin of an earthworm is ________ and ________. spiny, hard hard, rough tough, soft moist, slippery 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 (iii) (ii) and (iii) (ii) and (iv) (i) and (ii) None What is the vital capacity of lungs of an average human? 3000 - 4500 ml 4200 - 5500 ml 1500 - 1800 ml 500 - 1000 ml 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.