NCERT (Biology) Class-VIII
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| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Cereals-------------rice 2. Plantation---------tea 3. Fruits--------------radish 4. Root crops-------potato | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for Rabi crops? 1. They are sown during winters. 2. They are harvested in February. 3. Wheat, gram are examples. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Plough-------loosening of soil 2. Hoe-----turning up the soil 3. Seed-drill------sowing seeds 4. Harrow-------removing weeds | ||
| BiologyDate Added: 2022-05-20 Which of the following statement is/are true for drip irrigation? 1. Drip irrigation is unsuitable for crops grown in row, especially high-value crops. 2. Drip irrigation supplies water directly to the root zone of a crop. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. NPK fertilizer--------------- potassium 2. Urea----------------------- nitrogen 3. Superphosphate of lime--------- phosphorus | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Microbes: very small living organisms 2. Cyst: soft outer covering on the body of micro-organisms 3. Pathogens: disease causing micro-organisms | ||
| BiologyDate Added: 2022-05-20 Which of the following statement is/are true for viruses? 1. They can reproduce inside the cells of living organisms. 2. They can be seen by simple microscopes. 3. They obtain their food from host cell. 4. They exhibit a variety of shapes. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Yeast----- fermentation of dough 2. Lactobacillus-------- formation of curd 3. Renin---- in medicines | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Typhoid----------- bacteria 2. Common cold-------- virus 3. Measles--------------- fungi | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Pox---------------sheep 2. Foot disease-------cattle 3. Tuberculosis--------humans | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are purpose of deforestation? 1. Procuring land for cultivation. 2. Building houses and factories. 3. Natural calamities. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for consequences of deforestation? 1. It causes droughts. 2. It leads to increase in water holding capacity of soil. 3. It results into desertification. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Wildlife sanctuary-------animals are protected from disturbance. 2. National park-------------reserved for wild plants. 3. Biosphere reserve------conservation of traditional life of tribals. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for endemic species? 1. They are found exclusively in a particular area. 2. Sal and wild mango are examples. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for reforestation? 1. It is restocking of the destroyed forests by planting new trees. 2. The planted trees should generally be of the different species which were found in that forest. 3. Reforestation can take place only naturally. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for a cell? 1. Robert Hooke in 1655 observed slices of cork under a simple magnifying device. 2. Cells in the living organisms, are basic structural units. 3. Cells in the living organisms are complex living structures. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Unicellular---------single-celled organism 2. Multicellular---------more than one cell 3. WBC-----shape is circular 4. Nerve cells----------receive message | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Plasma membrane------separates cell from one another. 2. Nucleus----------dense round body in centre. 3. Cytoplasm-------jelly-like substance. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for a gene? 1. Gene is a unit of inheritance in living organisms. 2. DNA carries genes. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for eukaryotic cells? 1. The cells having nuclear material without nuclear membrane. 2. Examples are bacteria and blue green algae. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Sperm-----------male gamete 2. Ova-------------female gamete 3. Fertilization--------fusion of gamete 4. Zygote--------------unfertilized egg | ||
| BiologyDate Added: 2022-05-20 What is/are true for test tube babies? 1. Sperms cannot reach the egg for fertilisation. 2. It is also called in-vitro fertilization. | ||
| BiologyDate Added: 2022-05-20 What is/are true for embryo? 1. It is the fertilized egg. 2. It develops in the uterus. 3. The stage of the embryo in which all the body parts can be identified is called a foetus. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for cloning? 1. Cloning is the production of an exact copy of a cell. 2. It was performed at the Boslin Institute in Edinburgh. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Amoeba--------binary fission 2. Hydra------------budding 3. Viviparous-------lay eggs | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for adolescence? 1. The period of life, when the body undergoes changes, leading to reproductive maturity. 2. Adolescence generally begins around the age of 10 and lasts upto 18 or 19 years of age. 3. The changes mark the onset of puberty. | ||
| BiologyDate Added: 2022-05-20 Which of he following is/are true for hormones? 1. Hormones are chemical substances. 2. They are secreted by exocrine glands. 3. They are controlled by pituitary gland. | ||
| BiologyDate Added: 2022-05-20 What is/are true for sex determination 1. It is determined by sperm. 2. It is carried by sex chromosome. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Thyroid-----------thyroxine 2. Pancreas---------insulin 3. Metamorphosis-------growth hormone | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for lighting? 1. Lightning is caused by the accumulation of charges in the clouds. 2. In 1752 Benjamin Franklin, French scientist, showed that lightning and the spark from clothes are essentially the same phenomena. | ||
| BiologyDate Added: 2022-05-20 What is/are true for lightning conductors? 1. It is a device used to conduct lightning in the buildings. 2. A metallic rod, taller than the building, is installed in the walls of the building during its construction. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for earthquakes? 1. An earthquake is a sudden shaking or trembling of the earth which lasts for a very short time. 2. It is caused by a disturbance deep outside the earth's crust. 3. The power of an earthquake is expressed in terms of a magnitude on a scale called the Richter scale. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for seismic waves? 1. The tremors produce waves inside the surface of the earth. 2. The waves are recorded by an instrument called the seismograph | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Celestial object-------star 2. Astronomy----------study of celestial bodies 3. 29 days----------time between two consecutive full moon | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for the moon? 1. The moon's surface is dusty and barren. 2. Edwin Aldrin was the third person to land on moon. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for a constellation? 1. It is a group of stars. 2. The shapes of constellations resemble objects familiar to those people. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Ursa Major--------Big Dipper 2. Orion------------Hunter 3. Cassiopeia--------W or M | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Mercury-------budh 2. Venus---------shukra 3. Jupiter--------rahu | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for mangalyaan? 1. It was the first mars mission. 2. It was placed in the orbit on November 5, 2013. 3. It was launched by ISRO. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Asteroids-----small objects revolve around moon. 2. Comets--------revolve around the sun. 3. Meteors----------enters earth's surface. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for air pollutants? 1. The substances which contaminate the air. 2. The sources of air pollutants are factories, power plants. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are correctly matched? 1. Carbon monoxide-----------complete combustion 2. Smog------------sulphur dioxide. 3. CFCs-------------ozone layer depletion | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for global warming? 1. Global warming can cause sea levels to rise dramatically. 2. It is the average rise in the temperature of the earth. | ||
| BiologyDate Added: 2022-05-20 Which of the following is/are true for Ganga Action Plan? 1. Ganga Action Plan was launched in 1986. 2. It aimed to reduce the pollution levels in the river. 3. The Government of India has launched a new initiative known as National Mission for Clean Ganga (NMCG) in 2016. | ||