5-(FCC-BA) A proteção mecânica do embrião dos mamíferos é realizada fundamentalmente
a) pelo alantoide.
b) pela placenta.
c) pelo saco vitelínico.
d) pelo corsão umbilical.
e) pelo saco amniótico.​

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?

Nucleic acid certain protein cell membranes certain carbohydrates

Paint and solvents pose no potential hazard to human health. select the best answer from the choices provided t f