World Wildlife Fund(WWF) published a survey in 2008. According to it, about 30% of animal species have become extinct over the period of 30 years(1975-2005). What will happen in future if this continues as it is?

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?