Which of the following is biodegradable?

• Leather belts

• Silver foil

• Iron nails

• Plastic mugs

Fungi that grow on bark are said to be

• Xylophilous

• Saxicolous

• Coprophilous

• Corticolous

83.

To an astronaut in space the sky will appear to be

• violet

• red

• blue

• black

On a rainy day, small oily films on water show brilliant colours. This is due to

• scattering

• dispersion

• refraction

• polarisation

Natural radioactivity was discovered by

• Rutherford

• Marie Curie

• Henri Becquerel

• Enrico Fermi

Rainbow formation is due to

• absorption of sunlight by water droplets

• diffusion of sunlight through water droplets

• ionisation of water droplets

• refraction and reflection of sunlight by water droplets

CAD stands for

• Computer Automatic Design

• Computer Aided Decode

• Computer Automatic Decode

• Computer Aided Design

Unix operating system is generally known as

• Multi User Operating System

• General Application

• Single User Operating System

• Single User Application Program

Who holds the world record as the youngest person to climb Mount Everest?

• Santosh Yadav

• Phu Dorjee

• Bachendri Pal

• Dicky Dolma

Hyperplasia means

• abnormal increase in number of cells

• ab increase in size of a cell

• excessive motility of muscle

• voracious eating