During a negative beta decay A. An atomic electron is ejected B. An electron which is already present within the nucleus is ejected C. A neutron in the nucleus decays emitting an electron D. A part of the binding energy of the nucleus is converted into an electron.

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?