of, typical of, or peculiar to the tropics
Answer:
Option (4).
Explanation:
Hypersensitivity may be defined as the hyper immune response of the body. Hypersensitive is also known as hyper sensitive reaction that may be uncomfortable and harmful for the individual.
Type IV hypersensitive reaction is also known as delayed type of hypersensitivity that are generally mediated by T cells. Hemolytic disease of new born is an example of Type II hypersensitive reaction and not related to Type IV hypersensitive reaction.
Thus, the correct answer is option (4).
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.
To learn more about red blood cells here
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Explanation:
Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity. Every factor in an ecosystem depends on every other factor, either directly or indirectly
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Answer:
fossils and sratigraphy help it help