In a healthy human eye, the focusing is done by the A. To and fro movement of the eye-lens B. Changing the curvature of the retina C. Change in the convexity of the lens through ciliary tubes D. Change in the refractive index of the eye fluid.

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?