What is the direction of force of friction acting on a body moving on a fixed surface? A. Along the direction of motion B. Opposite to the direction of motion C. It has no direction D. At an angle to the direction of motion

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?