Which of the following is an example of genetic variation? (a) One person has a scar, but his friend does not. (b) One person is older than another. (c) Reeta eats meat, but her sister Geeta is a vegetarian. (d) Two children have different eye colours.

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?