Irina is in her first week of pregnancy. During this time, ...

[Lisaclaire]

Irina is in her first week of pregnancy. During this time, __________.
 
  A) heart muscles begin to develop
  B) the zygote multiplies and forms a blastocyst
  C) a primitive brain and spinal cord appear
  D) the embryo can move

Question 2

The embryonic disk __________.
 
  A) becomes the new organism
  B) is the outer ring of cells on a blastocyst
  C) has a good chance of survival outside the womb
  D) is a protective membrane that surrounds the amnion

[yasmina]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: A

[Lisaclaire]

Thanks for the timely response, appreciate it

[zacnyjessica]

Great answer, keep it coming