NCERT (Biology) Class-VII
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| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Cells---------tiny units 2. Cell membrane------thick outer boundary 3. Cytoplasm-------jelly-like substance | ||
| BiologyDate Added: 2022-05-20 What is/are true for photosynthesis? 1. Chlorophyll helps leaves to capture the energy of the sunlight. 2. The pores are surrounded by 'guard cells'. Such pores are called stomata. 3. Water is taken by tiny pores. | ||
| BiologyDate Added: 2022-05-20 Which is/are true for heterotrophic nutrition? 1. Plants depend on the food produced by other plants. They use the heterotrophic mode of nutrition. 2. The plant on which it climbs is called the host. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for saprophytes? 1. The mode of nutrition in which organisms take in nutrients from dead and decaying matter. 2. Algae is an example. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for digestion in humans? 1. The process of taking food into the body is called ingestion. 2. The saliva breaks down the starch into carbohydrates. 3. Liver secretes bile juice that is stored in a sac called the gall bladder. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for teeth? 1. Milk teeth fall off at the age between six to nine years. 2. The permanent teeth may last throughout life. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for tooth decay? 1. It causes severe toothache and in extreme cases results in tooth loss. 2. These bacteria break down the sugars present from the left over food and release acids. | ||
| BiologyDate Added: 2022-05-20 What is/are true for diarrhoea? 1. It may be caused by an infection, food poisoning or indigestion. 2. It is caused by the excessive loss of water and salts from the body. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for amoeba? 1. Amoeba does not changes its shape and position. 2. Digestive juices are secreted into the food vacuole. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/true for animals yielding wool? 1. Yak wool is common in Tibet and Ladakh. 2. Wool of sheep is woven into fine shawls called Pashmina shawls. 3. Llama and Alpaca, found in South America, also yield wool. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Lohi----------good quality wool 2. Nali-----------coarse wool 3. Patanwadi---------for hosiery | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for silk? 1. Silkworms spin the 'silk fibres' 2. The rearing of silkworms for obtaining silk is called sericulture. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for rearing silk? 1. The eggs are warmed to a suitable temperature for the larvae to hatch from eggs. 2. After 22 to 30 days, the caterpillars stop eating and move to a tiny chamber of bamboo in the tray to spin cocoons. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Humus ------- rotting dead material 2. Weathering ------- breaking down of rocks 3. Soil profile -----------------horizontal section of different layers of soil | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. A horizon--------soft and porous 2. B horizon-------humus 3. C horizon-------lumps of rocks | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Sandy soil-------greater proportion of big particles 2. Clayey soil----------fine particles 3. Loamy soil----------mixture of clay and sand | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for aerobic respiration? 1. Respiration takes place in the cells of all organisms. 2. Breakdown of glucose occurs with the use of oxygen. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for yeast : 1. They are single-celled organisms. 2. They respire aerobically and during this process yield alcohol. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Aerobic respiration----------carbon dioxide and water 2. Anaerobic respiration---------lactic acid 3. Glucose-------carbon monoxide | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for breathing? 1. Breathing means taking in air rich in oxygen and giving out air rich in carbon dioxide. 2. The taking in of air richXC in oxygen into the body is called exhalation. 3. The number of times a person breathes in a minute is termed as the breathing rate. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Inhalation--------ribs moves up 2. Exhalation------diaphargm moves down 3. Inhaled air------21% oxygen | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Cockroach------------spiracles 2. Earthworm-------trachea 3. Fish----------------gills | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Blood-----------transports substances like digested food. 2. Red blood cells------contain a red pigment called haemoglobin. 3. White blood cells--------formation of clot. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Arteries---------carries oxygen-rich blood 2. Veins------------carbon dioxide-rich blood 3. Capillaries-------thick blood vessels | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correct for pulse rate? 1. The number of beats per minute 2. A resting person, usually has a pulse rate between 70 and 80 beats per minute. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for heart? 1. The heart is an organ which beats continuously. 2. The heart is located in the chest cavity with its upper tip slightly tilted towards the left. 3. The two upper chambers are called the atria. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for stethoscope? 1. It is a device to listen the heart beat. 2. It consists of a chest piece that carries a sensitive diaphragm. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/ are correctly matched? 1. Kidneys--------filter the blood 2. Ureter-----tube-like structure 3. Urethra---------urinary opening | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for urine? 1. An adult human being normally passes about 1-1.5 L of urine in 24 hours. 2. The urine consists of 95% water, 2.5% urea and 2.5% other waste products. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for transportation in plants? 1. Plants absorb water and minerals by the roots. 2. The root hair decrease the surface area of the root for the absorption of water and mineral nutrients. 3. The vascular tissue for the transport of water and nutrients in the plant is called the xylem. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for reproduction in plants? 1. Most plants have roots, stems and leaves. 2. Flowers do not perform the function of reproduction in plants. 3. They can reproduce by asexual mode only. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for vegetative propagation? 1. Plants produced by vegetative propagation take less time to grow and bear flowers and fruits. 2. The new plants are exact copies of the parent plant. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Budding---------yeast 2. Fragmentation-------algae 3. Spore formation---------bryophyllum | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Pistil--------female reproductive part 2. Stamen--------male reproductive part 3. Unisexual---------contain only carpel | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Fruit----------ripened ovary 2. Seed----------embryo 3. Self-pollination---------- the pollen lands on the stigma of the different flower. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for ground water? 1. The moisture in the soil indicates the presence of water underground. 2. The process of seeping of water into the ground is called infiltration. 3. At places the groundwater is stored between layers of soft rock below the water table . | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are reasons for depleting water table? 1. Increase in population. 2. Industrial activities 3. Ample rainfall | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are methods of water management? 1. Drip irrigation 2. Rainwater harvesting 3. Bawris | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are effects of deforestation? 1. The amount of carbon dioxide in air will decrease. 2. The animals will not get food and shelter. 3. The soil will not hold water. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for cleaning water? 1. It is a process of removing pollutants after it enters a water body or is reused. 2. It is called sewage treatment | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for sewage? 1. Sewage is a complex mixture containing suspended solids. 2. Nitrates and phosphorus are nutrients. | ||
| BiologyDate Added: 2022-05-20 Which of the following order is correct for water treatment plant? 1. Wastewater is passed through bar screens. 2. The water is then allowed to settle in a large tank which is sloped towards the middle. 3. Water then goes to a grit and sand removal tank. 4. Air is pumped into the clarified water to help aerobic bacteria to grow. | ||