The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age? (a) Oestrogen from testes and testosterone from ovar. (b) Estrogen from adrenal gland and testosterone from pituitary gland. (c) Testosterone from testes and estrogen from ovary. (d) Testosterone from thyroid gland and estrogen from pituitary gland.

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?