Differentiate between meristematic and permanent tissues.
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The difference between Meristematic Tissue and Permanent Tissue are:Meristematic tissue always has a prominent nucleus. Permanent tissue has a prominent nucleus in some like parenchyma while not in others like sclerenchyma.Meristematic tissue has cells small in size and isodiametric in shape. Permanent tissue has cells large in size and their shape varies.I hope it helps

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.