A group of students uses a pitfall trap for capture and release of rare stag beetles. Which of these situations would NOT cause an error in estimating the population size? A. Stag beetles have a larval stage in their life cycle, which was not caught by the pitfall traps. B. The stag beetles were infected with a fungal pathogen and a large number died between weeks one and two. C. The stag beetles could not disperse widely in the week between samples. D. The stag beetles are evenly distributed throughout the forest.

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.

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