A new study investigating the origins of diversity in the structure of the mitotic spindle in nematode embryos, at timescales spanning a few generations to hundreds of millions of years, finds that most features of the spindle evolve via a scaling relationship generated by natural selection acting directly upon embryo size.

Silver nanoparticles are synthesized by various processes such as chemical, physical, and biology. However, biology method is the best between all of them due to safe, eco-friendly, eco-environmental, sometimes available. The obtained nanoparticle was characterized TEM, SEM, XRD, UV. size shape play a main key in enter bacteria cell. destroyed cell membrane entered cells. With change silver ato...

embryonic stem cells (escs) are undifferentiated cells which are typically derived from the inner cell mass of a blastocyst-stage embryo. in culture, these cells have the capacity to self-renew in an undifferentiated state but also may differentiate into cell types representing the three embryonic germ lineages, thus revealing their pluripotent potential. these cells could be of value for creat...

OPINION article Front. Immunol., 08 March 2021Sec. T Cell Biology https://doi.org/10.3389/fimmu.2021.618216