A person is undergoing prolonged fasting. His urine will be found to contain abnormal quatities of :

Blood pressure and heart beat is regulated by :

Heart covering is :

Bicuspid valve guards the opening in mammals between :

Tachycardia is :

Sulphur bacteria, Nitrogen bacteria are the members having nutrition of type :

During cellular respiration, one molecule of glucose is first broken down into two molecules of :

Arteries and veins are connected by a network of extremely narrow tubes called :

Which among the following is necessary to carry out the blood coagulation in a cut or wound?

Plants use the energy stored in ATP to accomplish the process of transportation of :

The excretory unit of the human excretory system is known as :

The process of diffusion of solvent particles from the region of less solute concentration to a region of high solute concentration through semi – permeable membrane is known as :

The vein which brings clean blood from the lungs into the heart is known as :

Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of :

Which of the following help in protecting the inner lining of the stomach from the harmful affect of HCl ?