The layer of the atmosphere in which Radio Waves are reflected back is called:

• Exosphere
• Ionosphere
• Troposphere
• Stratosphere

The technique of 'DNA sequencing' was discovered by:

• H. G. Khorana
• Watson and Crick
• Frederick Sanger
• E. M. Southern

Part of earth where life exist is known as:

• Lithosphere
• Hydrosphere
• Atmosphere
• Biosphere

The motion of which particle through a metallic wire is called electric current?

• Electron
• Positron
• Neutron
• Photon

Cerebral Malaria is caused by:

• Plasmodium vivax
• Plasmodium malariae
• Plasmodium falciparum
• None of the above

Adult Filaria worms live in human:

• Blood
• Lymphatics
• Liver
• Intestine

The disease caused due to lack of antidiuretic hormone (ADH):

• Diabetes insipidus
• Diabetes mellitus
• Grave's disease
• Cushing's disease

The animal group that is not found in marine water:

• Mammals
• Amphibia
• Reptiles
• Aves

Normal human blood is:

• Acidic
• Alkaline
• Neutral
• Variable

Which one of the following organs is the main respiratory organ of whale?

• Integuments
• Gills
• Lungs
• Trachea