In 1879, who observed cell division in salamander embryos, where cells divide at fixed intervals?

Walther Flemming

The correct answer is Option (3)-Walther Flemming

Walther Flemming, a German biologist, is credited with the pioneering observation of cell division in salamander embryos in 1879, where cells undergo division at fixed intervals. His significant contributions extended to the development of a staining technique that allowed for clearer observation of chromosomes. Flemming's meticulous research marked the inception of mitosis studies, earning him the title of the founder of cytogenetics. He was the first person to conduct a systematic study of chromosomes during division and called this process mitosis.