Tobacco smokers (and those exposed to tobacco smoke) are at greater risk of an ectopic (tubal) pregnancy. based on your understanding of the structures of the cytoskeleton, what is the best explanation?

Ectopic pregnancy is an abnormal type of pregnancy that occurs on the Fallopian tube instead of the uterus. In normal cases after fertilization taking place in the Fallopian tube, the fertilized ovum is propelled by cilia to the uterus for implantation. Tobacco interferes with the sweeping motion of that aids movement of the ovum to the uterus.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.