The average land holding of a marginal farmer in India

Which of the following statement(s) is/are true?

I. During inhalation ribs move out

II. During exhalation ribs move in

_____ is a thyroid hormone which controls the balance of calcium in the body 

Weight of one cotton bale is:

Which among the following nutrients is essential for the normal functioning of the thyroid gland?

The frequency range of human hearing is approximately:

Mycorrhiza is a symbiotic association between :

The acceleration due to gravity on the surface of the Earth is approximately:

Which of the following method can be employed to test the Hardness of Water?

Two capacitors of capacitance 6 µF and 3 µF are connected in series across a battery of constant voltage.