X
Email me Daily Riddles
Question:- Given bellow are the psychological manifestations of noise pollution. (i)Constriction of blood vessels (ii)Increase in the rate of heart beat (iii)Digestive spasms (iv)Dilation of pupil of the eye Select the correct options A.(i) and (ii) are correct B.(i) and (iii) are correct C.(ii) and (iv) are correct D.(i), (ii), (iii) and (iv) are correct
Answer:- D
Question:- Which gas is safe and an effective extinguisher for all confined fires? A.Nitrogen dioxide B.Carbon dioxide C.Sulphur dioxide D.Nitrous Oxide
Answer:- B
Question:- Which one of the following statements is incorrect about laser? A.It is a technique for producing intense beams of light, ultraviolet or infrared radiation of different wavelength. B.Even in diamond laser beam can drill a hole. C.A variety of lasers have been made from solids like the ruby crystal and semi conducting materials, liquids and gases. D.All waves in laser, travel in phase.
Answer:- A
Question:- Which one of the following elements the drum of a Photostat machine is made up of: A.Aluminium B.Selenium C.Barium D.Caesium
Answer:- B
Question:- If we say the child has an IQ of 100, what does this means? A.The performance of the child is below average. B.The performance of the child is above average. C.The mental age of the child is equal to his actual age. D.The performance of the child cannot be better.
Answer:- C
Question:- Which bacteria is responsible for the formation of curd? A.Lactic acid bacteria B.Lactobacillus Acidophillus C.Lactobacillus aureus D.Bacillus radicicola
Answer:- B
Question:- Which one of the following bacteria present in the soil produces a peculiar smell if it rains on perched soil? A.Streptomycetes B.Staphymycetes C.Diplomycetes D.Micrococcus
Answer:- A
Question:- In poorly ventilated buildings which one of the following inert gases can be accumulated? A.Helium B.Neon C.Argon D.Radon
Answer:- D
Question:- Honey is sweeter than cane sugar or corn syrup. Which one of the following carbon sugars is responsible for this? A.Dextrose B.Levulose C.Sucrose D.Fructose
Answer:- B
Question:- Who had given the theory of evolution of species by natural selection? A. Darwin B. Mendel C. Dalton D. Morgan
Answer:- Ans. A Explanation: Charles Robert Darwin gave the theory of evolution in his book “The Origin of Species”. The theory proposed by him is known as “The Theory of Natural Selection”.
Question:- Who is known as the father of genetics? A. Mendel B. Darwin C. Dalton D. Marie Curie
Answer:- Ans. B Explanation: Gregor Mendel is termed as the father of genetics because he has discovered the basic principles of heredity.
Question:- Which of the following are the sources which provide evidences for evolution? A. Homologous organs B. Analogous organs C. Fossils D. All the above
Answer:- Ans. D Explanation: The important sources which provide evidences for evolution are homologous organs, analogous organs and fossils.
Question:- Name a fossil bird which looks like a bird but has many other features found in reptiles? A. Dodo B. Archaeopteryx C. Flamingos D. Mouse Bird
Answer:- Ans. B Explanation: Archaeopteryx is a fossil bird which looks like a bird but it has many other features which are found in reptiles.
Question:- Name the organs which have different basic structure but have similar appearance and perform similar functions? A. Analogous organs B. Homologous organs C. Both A and B D. Neither A nor B
Answer:- Ans. A Explanation: Analogous organs have different basic structure but have similar appearance and perform similar functions. Example wings of an insect and a bird have different structures but similar functions.