What are natural killer cells
What are natural killer cells?
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These are big granulated lymphocytes posse’s spontaneous cytotoxicity in the direction of different target cells mostly the malignant cells and virus infected cells. Their cytotoxicity is not antibody dependant. They join to glycoprotein receptor of target cells and discharge cytolytic factor.
Regarding germ layers and the existence of coelom how arthropods are characterized? Answer: Arthropods are triploblastic (that is, they have three germ layers) and a
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