Some Species of Which of the Above Kinds Of Organisms are Employed as Biopesticides?
Consider the following kinds of organisms : 1. Bacteria 2. Fungi 3. Flowering plants Some species of which of the above kinds of organisms are employed as biopesticides?(2012) a)1 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3 Answer: D All can be used as biopesticides.
What Is The Role of Ultraviolet (UV) Radiation In The Water Purification Systems?
What is the role of ultraviolet (UV) radiation in the water purification systems? 1 It inactivates /kills the harmful microorganisms in water. 2 It removes all the undesirable odours from the water. 3 It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water. Which of the statements given above is/are […]
Graphene Is Frequently In The News Recently. What is its importance?
Graphene is frequently in the news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is one of the thinnest but strongest materials tested so far. 3. It is entirely made of silicon and has high optical transparency. 4. It can be used as ‘conducting electrodes’ […]
What is the Difference Between Asteroids and Comets?
What is the difference between asteroids and comets? 1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material. 2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury. 3. Comets show a perceptible glowing […]
What is the Difference Between Bluetooth and Wi-Fi Devices
What is the difference between Bluetooth and Wi-Fi devices?(2011) a) Bluetooth uses 2.4 GHz radio frequency band, whereas-Wi-Fi can use 2.4 GHz or 5 GHz frequency band b) Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for Wireless Wide Area Networks (WWAN) only c) When information is transmitted between […]
Both Bluetooth and Wi-Fi Don’t Require Line of Sight.
Both Bluetooth and Wi-Fi don’t require line of sight. Aspartame is an artificial sweetener sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low-calorie sweetening agent in food items. What is the basis of this use?(2011) a) Aspartame is as sweet as […]
What is the Difference Between a CFL and an LED lamp?
What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material. 2. The average life span of a CFL is much longer than that of an LED lamp. 3. A CFL is less energy-efficient as compared to […]
A Married Couple Adopted a Male Child, A few years later; Twin Boys Were Born to them
A married couple adopted a male child, A few years later; twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is(2011) a) O positive […]
A New Optical Disc Format Known As the Blu-ray Disc (BD) is Becoming Popular. In what way is it different from the traditional DVD?(2011)
A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD?(2011) 1. DVD supports Standard Definition video while BD supports High Definition video. 2. Compared to a DVD, the BD format has several times more storage capacity. 3. Thickness of BD is […]
An Artificial Satellite Orbiting Around the Earth Does Not Fall Down. This is so because the attraction Of Earth(2011)
An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction Of Earth(2011) a) does not exist at such distance b) is neutralized by the attraction of the moon c) provides the necessary speed for its steady motion d) provides the necessary acceleration for its motion Answer: D Self […]