Question: In animals, blood clots serve the function of [A]. consuming invading organisms [B]. helping them match the background coloration of the habitat [C]. stimulating production of killer T lymphocytes [D]. repairing damage to the body wall Answer: Option D…

Question: Which of the following produces the antibodies employed in the specific immune response of vertebrates? [A]. B lymphocytes [B]. T lymphocytes [C]. Neutrophils [D]. Macrophages Answer: Option A Explanation: No answer description available for this question.

Question: Which of the following provide specific defense against viruses and bacteria? [A]. T cells [B]. B cells [C]. Complement [D]. inflammation Answer: Option B Explanation: No answer description available for this question.

Question: Lack of reaction to our own human leukocyte antigens (HLAs) is known as? [A]. autoimmunity [B]. complement system [C]. clonal selection [D]. tolerance Answer: Option D Explanation: No answer description available for this question.

Question: A cell which defends against body cells in which viruses are reproducing is [A]. Exotoxin [B]. Cytotoxic T cell [C]. Endotoxin [D]. Suppressor T cell Answer: Option B Explanation: No answer description available for this question.

Question: Which of the following white blood cells act as scavengers when they engulf and digest pathogens? [A]. Macrophages [B]. T cells [C]. B cells [D]. Lymphocytes Answer: Option A Explanation: No answer description available for this question.