Questions

In transfusions of packed red blood cells, individuals with type O Rh D negative blood are often called universal donors. Those with type AB Rh D positive blood are called universal recipients.

The immune system of a person with AB blood will accept blood from all possible donors, whether they have O, A, B, or AB blood. Since both A and B antigens are present in a person with AB blood, the recipient won't reject the blood. The body identifies that blood as "self" rather than "foreign."

Something that saves your money is cost-effective and is also called as economical.

The atomic mass of an element depends upon the number of protons, electrons and neutrons in the atoms which make the elements.

a) joins the Gulf of Mexico and Atlantic Ocean, and touches USA and Bahama Island.

b) joins the sea of Marmara and Aegean Sea, touching Asian Turckey and European  Turkey

d) joins Black sea and sea of Marmara touching Asian Turkey and European Turkey

Arati Saha was the first Indian woman to cross English Channel (between England and France) in the year 1959. She was born in 1940 in Kolkata.