n. A diploid cell from which an egg or ovum develops by meiosis. A primary oocyte divides to produce a polar body and a secondary oocyte, which divides again to produce the ovum and another polar body.(ËÉÊÉËsaÉªt). diploid cell from which an egg or ovum develops by meiosis. A primary oocyte divides to produce a polar body and a secondary oocyte, which divides again to produce the ovum and another polar body. (ËÉÊÉËsaÉªt).
NicÃ©phore NiÃ©pce. NicÃ©phore NiÃ©pce (born Joseph NiÃ©pce; 7 March 1765 â 5 July 1833) was a French inventor, now usually credited as the inventor of photography and a pioneer in that field. NiÃ©pce developed heliography, a technique he used to create the world's oldest surviving product of a photographic process: a print made from a photoengraved printing plate in 1825.
Photography is the result of combining several different technical discoveries. Long before the first photographs were made, Chinese philosopher Mo Ti and Greek mathematicians Aristotle and Euclid described a pinhole camera in the 5th and 4th centuries BCE. In the 6th century CE, Byzantine mathematician Anthemius of Tralles used a type of camera obscura in his experiments.