The Small Portion of the Embryo That Will Become Its

Q25: A human blastomere is<br>A) an embryonic cell

Q28: The vertebrate ectoderm is the origin of

Q37: In sea urchins, the "fast block" and

Q39: In a newly fertilized egg, the vitelline

Q52: In placental mammals, the yolk sac<br>A) transfers

Q69: Extraembryonic membranes develop in<br>A) mammals, but not

Q74: As an embryo develops, new cells are

Q79: In an egg cell treated with EDTA,

Q80: Contact of a sperm with signal molecules

Q85: From earliest to latest, the overall sequence