Consider the following statements: 1. In a seismograph, P waves are recorded earlier than S waves. 2. In P waves, the individual particles vibrate to and fro in the direction of wave propagation whereas in S waves, the particles vibrate up and down at right angles to the direction of wave propagation Which of the […]
With reference to coal-based thermal power plants in India, consider the following statements : 1. None of them uses seawater. 2. None of them is set up in water-stressed district. 3. None of them is privately owned. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) […]
Wolbachia method’ is sometimes talked about with reference to which one of the following? (a) Controlling the viral diseases spread by mosquitoes (b) Converting crop residues into packing material (c) Producing biodegradable plastics (d) Producing biochar from thermo- chemical conversion of biomass Answer: A The correct answer is (a). Wolbachia is a bacterium that can […]
How many of the above activities are often considered and discussed for carbon capture and sequestration?
Consider the following activities: 1. Spreading finely ground basalt rock on farmlands extensively 2. Increasing the alkalinity of oceans by adding lime 3. Capturing carbon dioxide released by various industries and pumping it into abandoned subterranean mines in the form of carbonated waters How many of the above activities are often considered and discussed for […]
‘Aerial metagenomics’ best refers to which one of the following situations? (a) Collecting DNA samples from air in a habitat at one go (b) Understanding the genetic makeup of avian species of a habitat (c) Using air-borne devices to collect blood animals samples from moving (d) Sending drones to inaccessible areas to collect plant and […]