What was the role of the water test tube in each phase AND why does water work so well in this capacity?

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?

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

The human genome consist of about chemical letters