Which of the following statements concerning allografts is TRUE?
A. They are the best type of transplants because they are not associated with rejection.
B. They induce strong type IV hypersensitivity reactions and must be treated with immunosuppressive drugs.
C. They always require complete destruction of the recipient's bone marrow cells.
D. They are impossible to perform because the antigens between donor and recipient are so different.
E. They are the rarest type of transplants.
Answer: B
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____________ is the light-fueled conversion of carbon dioxide to organic material.
Fill in the blank(s) with correct word.