Science & Mathematics Questions & Answers

The abbreviation originated in an effort to separate people qualified to practice medicine from those holding the highest academic degree i.e. doctorate in non-medical subjects. Hence, a physician or surgeon is denoted by Dr, while the holders of academic degrees are known by the initial ‘D’ e.g. DPhil (Philosophy) or DLitt (Literature). In USA, only dentists and veterinary surgeons are …

What does cold blooded mean? Creatures such as mammals have a body temperature which stays roughly the same whatever surroundings they are in. This temperature varies from creature to creature, for example the body temperature of any healthy human is 98.4 degrees Fahrenheit. Some creatures are cold blooded, which means that the body temperature varies according to the animals surrounding. …

Perhaps you already know, which blood group you belong to: A, B, AB, O, Rhesus + Rhesus + (Rhesus Positive), or Rhesus – (Rhesus Negative). But do you know what these letters and signs mean? Although all human blood looks the same when see under a microscope, we do not all have the same type of blood. Some substances, found …

Blood plays vital role in the life of our body. It is a fluid that circulates through the heart and blood vessels, supplying nutritive materials to every part of the body and carrying off waste products. It is colorless fluid, plasma, in which float myriads of corpuscles. There are of three kinds: red, white and platelets. Learn More: Blood is …

A blood donor can give about half a litre of blood. The blood is kept for transfusions to help save people’s lives. The body then makes more blood, but the donor should not give blood again for at least two months. Every year on 14 June, countries around the world celebrate World Blood Donor Day.

The cigarette was the last method of taking tobacco to be developed. Previously it had been smoked in pipes and cigars, inhaled as snuff (in powder form) and chewed. Tobacco itself was brought to Europe and the rest of the world when Columbus discovered America, and it was thought to have marvelous medicinal properties. No one could be said to …

The bollygard cotton seed is suspected to have the ‘terminator seed’ technology which involves introduction of a gene that terminates the germination of the seeds after onetime usage. ‘Terminator’ is actually a name coined by the Canadian non-governmental organisation Rural Advancement Foundation International (RAFI) for a technology that essentially controls the expression of certain genes, causing the plant to turn …

What was the test? On March 27, 2019 India conducted Mission Shakti, an anti-satellite missile test, from the Dr. A P J Abdul Kalam Island launch complex. This was a technological mission carried out by DRDO. The satellite used in the mission was one of India’s existing satellites operating in lower orbit. The test was fully successful and achieved all …

There almost 5 liters of blood in the human adult’s body. But it is not the only fluid to circulate. A substance called ‘lymph’ circulates through a network of vessels throughout the body.

Ever since the philosopher and naturalist, Charles Darwin, and his contemporaries including Wallace, suggested that man had evolved from apes, there has been a continuous, and almost frantic quest for evidence of our ancestors. Of course, where we come from has always been a fascinating question, but it is only comparatively recently that systematic searches have been made for traces …