These are my doubts... Lesson is transportation in animals and plants

Dear Student,

Ans 1.
O blood group has no antigens so it is universal donor.
It can be donated to people with any other blood group. Basically O- blood group is a universal donor as O+ blood group cannot be donated to people with O- blood group.

Similarly, AB blood group has no antibodies so it is known as the universal acceptor. A person with blood group AB can accept blood from people of any other blood group. 

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