Which of these describes the b-cells within the immune system ? a) digestive system b) nonspecific receptor cells c) thymus maturing cells d) memory producing cells

The option D is correct.

B cells are memory producing cells.

As B cells are the specific receptor  cell, after immunity to certain infection of the foreign particle, there is a function of acquired immunity is the protection of the body from that particular infection for the whole life which is done by memory cells of B lymphatics.

a time line cause it goes from 685 to 978

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

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