Persons with O blood have neither antigen a nor antigen b on their red blood cells but have antibody anti-a and antibody anti-b in their plasma.
ABO blood grouping was discovered by Austrian scientist Landsteiner. It consist of four blood groups- A, B, AB, & O.
Red blood cells have certain extension of the proteins that are called antigen. Two types of antigens are there antigen a & b. The RBCs which have a particular antigen will not have the antibody against the same.
Blood Group A has antigen A and antibody B. Blood group B has antigen B and antibody A. Blood group AB has both antigen and no antibodies while blood group O has no antigen and antibody A & B.
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The recent events where scientific facts were changing our new discoveries on the moon and the new species of early humans have been discovered.
<h3>What are scientific facts?</h3>
Scientific facts are those facts that are based on scientific theories and experiments. These facts are true, and they came from organized and systematic knowledge.
Scientific facts were always changing s new discoveries happen. Scientist discovers new things every day.
Thus, the recent events are new discoveries on the moon, flying, and land in the martian area. A new species of early humans have been discovered.
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The tiny holes in the cell walls of plants that allow for the passing of materials are called the plasmodesmata. The correct option among the different options given in the question is the second option. Plasmodesmata are actually very small or rather microscopic channels that traverse the cell walls of the plant cells.
Answer: C. It manufactures red blood cells.
Brainliest please if it is correct!
The asteroid belt separates the terrestrial planets from the gas planets, so it stands to reason that it would be found between Mars and Jupiter.
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