In human osmoregulation takes place by___________?

A. Liver
B. Kidney
C. Spleen
D. Lungs

The average length of the kidney of a man is about?

A. 7cm to 8cm
B. 8cm to 10 cm
C. 10cm to 13 cm
D. 13cm to 16cm

The time taken by Sun to revolve around the center of our galaxy is___________?

A. 150 million years
B. 250 million years
C. 300 millon years
D. 350 millon years

Primary cosmic rays are composed largely of very fast__________?

A. Protons
B. Neutrons
C. Electrons
D. Gamma rays

The Sun produces most of its energy by_____________?

A. Nuclear fusion
B. Nuclear fission
C. Burning hydrogen
D. None of these

It is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. But the man feels quite comfortable,. It is because of__________?

A. An equal and opposite pressure acts from inside
B. Of the height of a MAN
C. Of gravity
D. Earth pulls the MAN upward

Inhaled air passes through which of the following in the last?

A. Bronchiole
B. Larynx
C. Pharynx
D. Trachea

In Eye donation, which part of the eye used?

A. Retina
B. Iris
C. Cornea
D. Optic nerve

Who is Considered as Father of Botany?

A. Aristotle
B. Gregor joghn mandle
C. Theophrastus
D. Corlous linnaeous

What is the body temperature of a normal man?

A. 81.1 °c
B. 37.0 °c
C. 98.6 °c
D. 21.7 °c