Imperfect fungi reproduce by:

Which chemical is used to generate light to weld metals?

Chlorophyll-a is present in all photosynthetic organisms except

What is heavy water?

The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:

The device which transfer the signal from low resistance region to high resistance region is –

Which of the following vitamins is called a water-soluble vitamin?

Newton's first law of motion gives the concept of –

Why do metals conduct electricity?

Water from soil enters into the root hairs owing to :

NaCl has which kind of bonds?