Which of the statements given above is/are correct ?(2020)
Consider the following statements : 1.Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent. 2.A person’s genome can be edited before birth at the early embryonic stage. 3.Human induced pluripotent stem cells can be injected into the embryo of a pig. Which of the statements given above […]
Which of the following is/are the example/examples of chemical change
Which of the following is/are the example/examples of chemical change? 1. Crystallization of sodium chloride 2. Melting of ice 3. Souring of milk Select the correct answer using the code given below.(2014) a) 1 and 2 only b) 3 only c) 1, 2 and 3 d) None ANswer: B Chemical changes occur when a substance […]
Which of the above is/are used to create transgenic crops?
Consider the following techniques/phenomena: 1. Budding and grafting in fruit plants 2. Cytoplasmic male sterility 3. Gene silencing Which of the above is/are used to create transgenic crops?(2014) a) 1 only b) 2 and 3 c) 1 and 3 d) None Answer: B A transgenic crop is a genetically modified organism (GMO). Transgenic indicates that […]
With reference to the carbon nanotubes, consider the following statements:
With reference to the carbon nanotubes, consider the following statements: Which of the statements given above are correct?(2020) a) 1 and 2 only b) 2, 3 and 4 only c) 1, 3 and 4 only d) 1, 2, 3, and 4 C The nanotube’s structure allows it to be used as a container for transporting […]
Which of the above activities can be successfully carried out by using drones ?
Consider the following activities : 1.Spraying pesticides on a crop field 2.Inspecting the craters of active volcanoes 3.Collecting breath samples from spouting whales for DNA analysis At the present level of technology Which of the above activities can be successfully carried out by using drones ?(2020) a) 1 and 2 only b) 2 and 3 […]
Which of the above are optical illusions?
Consider the following phenomena: 1. Size of the sun at dusk 2. Colour of the sun at dawn 3. Moon being visible at dawn 4. Twinkle of stars in the sky 5. Polestar being visible in the sky Which of the above are optical illusions?(2013) a) 1, 2 and 3 b) 3, 4 and 5 […]
Which of the following physical phenomena are responsible for this?
Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this? 1. Dispersion 2. Refraction 3. Internal reflection Select the correct answer using the codes given below.(2013) a) 1 and 2 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and […]
Many Transplanted Seedlings do not grow because
Many transplanted seedlings do not grow because(2013) a) the new soil does not contain favourable minerals b) most of the root hairs grip the new soil too hard c) most of the root hairs are lost during transplantation d) leaves get damaged during transplantation Answer: C Many transplanted seedlings do not grow because most of […]
Select the correct answer using the codes given below
Which of the following statements is / are correct? 1. Viruses lack enzymes necessary for the generation of energy. 2. Viruses can be cultured in any synthetic medium. 3. Viruses are transmitted from one organism to another by biological vectors only. Select the correct answer using the codes given below.(2013) a) 1 only b) 2 […]
The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force
The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?(2013) a) Gravity is the strongest of the four b) Electromagnetism act only on particles with an electric charge c) Weak nuclear […]