CBSE Class 12 Organisms and Populations — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Organisms and Populations in the app →Seasonal changes in temperature and precipitation create major biomes such as desert, rain forest and:An organism's tolerance range, resources used and functional role together make up its:Mango trees cannot grow in Canada, and snow leopards are absent from Kerala. The factor behind both is:Temperature matters to organisms because it affects the kinetics of:An animal that thrives across a wide range of temperatures is:Freshwater fish die in sea water mainly because of:Birds and mammals keep a constant body temperature. They are called:About what fraction of animals cannot maintain a constant internal environment?Very small animals are rare in polar regions because they:Thousands of Siberian birds winter every year at Keoladeo National Park in:Bears escape winter by going into:Some snails and fish avoid summer heat and drying by:The kangaroo rat meets all its water needs from:Desert plants sink their stomata in deep pits to reduce:Mammals from cold climates have shorter ears and limbs to:Seals in polar seas stay warm thanks to a thick layer of fat called:All the lotus plants in one pond form a:Natural selection operates at the level of the:A Paramecium doubling daily illustrates which growth when food and space are unlimited?Prickly pear cactus overran Australia until a cactus-feeding ___ was introduced.The Monarch butterfly is distasteful to birds because as a caterpillar it fed on a:On Scottish coasts the larger barnacle Balanus excludes the smaller: