CBSE Class 10 Science Gk Questions & Answers
11 Which of the following radiations is responsible for the conversion of atmospheric oxygen to ozone?
Answer: Ultraviolet radiations
12 Which among the following is a correct full form for DDT?
13 The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as:
Answer: Biological magnification
14 Green plants utilize ……… percent of sun’s energy to prepare their food by the process of photosynthesis?
Answer: 1 percent
16 Which among the following statements is incorrect in view of the plants?
Answer: They prepare their food from organic compounds
17 The number of chromosomes in both parents and offsprings of a particular species remains constant because:
Answer: Chromosomes get halved during gamete formation
18 The number of chromosomes in parents and offsprings of a particular species remains constant due to:
Answer: Halving of chromosomes during gamete formation
20 Which among the following is a unicellular organism that reproduces by budding: