A student was asked to take 10 ml of rainwater in test tube A and l g of calcium sulphate added to 10 ml of distilled both the test tubes B. He added couple of drops of soap solution to both A and B. After shaking both the test tubes equal number of times, what did the student observe ?

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?