What is a combination of earths crust and Ridgid outer most part of the mantle

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?