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