Which of the following kinds of organism is / are known as decomposer organism/organisms?
With reference to the food chains in ecosystems, which of the following kinds of organism is / are known as decomposer organism/organisms? 1. Virus 2. Fungi 3. Bacteria Select the correct answer using the codes given below.(2013) a) 1 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3 […]
Which of the Following Diseases can be Transmitted from one person to another through Tattooing?
Which of the following diseases can be transmitted from one person to another through tattooing? 1. Chikungunya 2. Hepatitis B 3. HIV-AIDS Select the correct answer using the codes given below.(2013) a) 1 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3 Answer: B Chikungunya is a viral […]
Which of the Minerals Given above is/are required by the Human body for the Contraction of Muscles?(2013)
Consider the following minerals 1. Calcium 2. Iron 3. Sodium Which of the minerals given above is/are required by the human body for the contraction of muscles?(2013) a) 1 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3 Answer: D Minerals required by the human body for the […]
Recombinant DNA Technology (Genetic Engineering) Allows Genes To Be Transferred
Recombinant DNA technology (Genetic Engineering) allows genes to be transferred 1. across different species of plants 2. from animals to plants 3. from microorganisms to higher organisms Select the correct answer using the codes given below.(2013) a) 1 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3 Answer: […]
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 […]
How Do Antioxidants Help A Person Maintain Health and Promote Longevity
Regular intake of fresh fruits and vegetables is recommended in the diet since they are a good source of antioxidants. How do antioxidants help a person maintain health and promote longevity?(2011) a)They activate the enzyme necessary for vitamin synthesis in the body and help prevent vitamin deficiency b) They prevent excessive oxidation of carbohydrates, fats […]
What Is “Virtual Private Network”?
What is “Virtual Private Network”?(2011) a) It is a private computer network of an organization where the remote users can transmit encrypted information through the server of the organization b) It is a computer network across a public internet that provides users access to their organization’s network while maintaining the security of the information transmitted […]
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’ […]