Which of the following statements is / are correct?1. Viruses lack enzymes necessary for the generation of energy.2. Viruses can be cultured in any synthetic medium.3. Viruses are transmitted from one organism to another by biological vectors only.Select the correct answer using the codes given below.
Many transplanted seedlings do not grow because
Rainbow is produced when sunlight falls on drops of rain.Which of the following physical phenomena are responsible for this?
1. Dispersion 2. Refraction 3. Internal reflection
Select the correct answer using the codes given below.
Consider the following phenomena:1. Size of the sun at dusk2. Colour of the sun at dawn3. Moon being visible at dawn4. Twinkle of stars in the sky5. Polestar beingvisible in the sky
Which of the above are optical illusions?
Ball bearings are used in bicycles, cars, etc., because
Fruits stored in a cold chamber exhibit longer storage life because